No, but 278 out of 588 projects already build against Qt6.
Still missing are:
- akonadi-calendar-tools
- akonadiclient
- akonadiconsole
- akonadi-contacts
- akonadi-import-wizard
- akonadi-notes
- akonadi-search
- akregator
- alkimia
- amarok
- amor
- angelfish
- apper
- ark
- arkade
- artikulate
- asynqt
- atcore
- atcore-cli
- atelier
- atlantik
- audex
- audiotube
- aura-browser
- basket
- bonsai
- booth
- bovo
- buho
- calendarsupport
- calligra
- calligraplan
- cantor
- cervisia
- choqok
- clip
- colord-kde
- communicator
- confine
- croutons
- cutehmi
- dferry
- distro-release-notifier
- dolphin-plugins
- drkonqi-pk-debug-installer
- elf-dissector
- elisa
- eloquens
- eventviews
- falkon
- fielding
- francis
- gcompris
- grantlee-editor
- grantleetheme
- gwenview
- haruna
- heaptrack
- incidenceeditor
- index-fm
- inqlude-client
- juk
- k3b
- kaccounts-integration
- kaccounts-providers
- kaddressbook
- kaffeine
- kaidan
- kairo
- kajongg
- kalarm
- kalendar
- kalk
- kalternatives
- kamoso
- kasts
- kasync
- kbibtex
- kbruch
- kcachegrind
- kcalc
- kcalutils
- kcgroups
- kcharselect
- kcm-grub2
- kdav2
- kdb
- kde-cli-tools
- kdeconnect-kde
- kdecoration-viewer
- kde-dev-scripts
- kde-dev-utils
- kde-nomodeset
- kdepim-addons
- kdepim-runtime
- kdeplasma-addons
- kdesdk-thumbnailers
- kdesvn
- kdev-control-flow-graph
- kdev-css
- kdevelop
- kdevelop-pg-qt
- kdev-embedded
- kdev-executebrowser
- kdev-krazy2
- kdev-mercurial
- kdev-php
- kdev-python
- kdev-ruby
- kdev-upload
- kdev-valgrind
- kdev-verapp
- kdev-xdebug
- kdiff3
- kexi
- kgeotag
- kget
- kgpg
- kgraphviewer
- khelpcenter
- khipu
- kid3
- kig
- kije
- kile
- kimagemapeditor
- kimap2
- kinfocenter
- kio-extras
- kio-fuse
- kio-gdrive
- kio-s3
- kipi-plugins
- kirogi
- kiten
- kjots
- kleopatra
- klook
- kmail
- kmail-account-wizard
- kmailtransport
- kmix
- kmouth
- kmplayer
- kmplot
- kmuddy
- kmymoney
- knights
- knotes
- kobjecttracking
- kodaskanna
- kolor-manager
- kolourpaint
- kompare
- konqueror
- kontact
- kooka
- kopete
- korganizer
- kpeoplesink
- kphotoalbum
- kproperty
- kqtquickcharts
- kquickchatcomponents
- kquickitemviews
- krecorder
- kregexpeditor
- krename
- kreport
- krfb
- krita
- krusader
- kseexpr
- ksirk
- kstars
- kst-plot
- ksudoku
- ktechlab
- ktimetracker
- ktnef
- ktorrent
- ktouch
- ktp-accounts-kcm
- ktp-approver
- ktp-auth-handler
- ktp-call-ui
- ktp-common-internals
- ktp-contact-list
- ktp-contact-runner
- ktp-desktop-applets
- ktp-filetransfer-handler
- ktp-kded-module
- ktp-send-file
- ktp-text-ui
- kube
- kubrick
- kubuntu-notification-helper
- kuickshow
- kup
- kwave
- kwin
- kwordquiz
- kxstitch
- lancelot
- latte-dock
- libdebconf-kde
- libgravatar
- libkimageannotator
- libkipi
- libkleo
- libkomparediff2
- libksieve
- libkubuntu
- libmediawiki
- libqgit2
- libqmycroft
- liquidshell
- lokalize
- mailcommon
- mailimporter
- mangonel
- marble
- mark
- massif-visualizer
- maui-accounts-dbus-daemon
- maui-accounts-gui
- mauikit
- mauikit-accounts
- mauikit-filebrowsing
- mauikit-imagetools
- mauikit-texteditor
- maui-libdavclient
- mauiman
- mbox-importer
- messagelib
- mtp-server
- muon
- mycroft-plasmoid
- mycroft-plasmoid-mobile
- nomad-style
- nota
- okular
- parley
- peruse
- phonon-gstreamer
- phonon-vlc
- pikasso
- pimcommon
- pim-data-exporter
- pim-sieve-editor
- pix
- plank-player
- plasma-active-window-control
- plasma-bigscreen
- plasma-browser-integration
- plasma-camera
- plasma-desktop
- plasma-dialer
- plasma-integration
- plasma-mobile
- plasma-packagekit
- plasma-pass
- plasma-pk-updates
- plasma-redshift-control
- plasma-remotecontrollers
- plasma-samegame
- plasmatube
- plasma-workspace
- pokipoki
- polkit-kde-kcmodules-1
- pology
- powerdevil
- poxml
- print-manager
- pvfviewer
- qmlkonsole
- qtcurve
- rkward
- rocs
- rolisteam
- rsibreak
- samba-mounter
- shelf
- signon-kwallet-extension
- sink
- skrooge
- smaragd
- smb4k
- sol
- station
- step
- stopmotion
- strike
- subtitlecomposer
- symboleditor
- symmy
- systemsettings
- telepathy-logger-qt
- tellico
- tikzkit
- trojita
- umbrello
- upnp-lib-qt
- vvave
- wacomtablet
- washipad
- xdg-portal-test-kde
- zanshin