Applications using GNOME-style filepickers and backends after uninstalling GNOME?

A while back, I installed GNOME and tried it out. It was nice, but it started causing issues. I uninstalled it and, accidentally, Plasma. After reinstalling Plasma (package neon-desktop?), a few Plasma-native apps such as Krita disappeared, and absolutely everything started using GNOME filepickers, pop-ups, and sometimes cursors… with glitches. Krita specifically has really bad flickering and mildly glitchy GNOME-style pop-ups. It didn’t do this before I accidentally broke Plasma. I don’t remember where, but I saw someone say xdg-desktop-portal-kde or whatever was the culprit, or wasn’t running-- and which xdg-desktop-portal-kde returns nothing, so maybe they’re right? Although apt says it’s installed…

System info:

da-avy-girl@DaFemboyPC-Aron:~$ neofetch
             `..---+/---..`                da-avy-girl@DaFemboyPC-Aron 
         `---.``   ``   `.---.`            --------------------------- 
      .--.`        ``        `-:-.         OS: KDE neon 6.3 x86_64 
    `:/:     `.----//----.`     :/-        Host: MS-7C56 6.0 
   .:.    `---`          `--.`    .:`      Kernel: 6.11.0-26-generic 
  .:`   `--`                .:-    `:.     Uptime: 2 hours, 37 mins 
 `/    `:.      `.-::-.`      -:`   `/`    Packages: 3702 (dpkg), 63 (flatpak), 9 (snap) 
 /.    /.     `:++++++++:`     .:    .:    Shell: bash 5.2.21 
`/    .:     `+++++++++++/      /`   `+`   Resolution: 1280x1024 
/+`   --     .++++++++++++`     :.   .+:   DE: Plasma 6.3.5 
`/    .:     `+++++++++++/      /`   `+`   WM: kwin 
 /`    /.     `:++++++++:`     .:    .:    Theme: Adwaita [GTK2/3] 
 ./    `:.      `.:::-.`      -:`   `/`    Icons: Tela [GTK2/3] 
  .:`   `--`                .:-    `:.     Terminal: konsole 
   .:.    `---`          `--.`    .:`      CPU: AMD Ryzen 7 5700X (16) @ 4.663GHz 
    `:/:     `.----//----.`     :/-        GPU: NVIDIA GeForce RTX 3070 Ti 
      .-:.`        ``        `-:-.         Memory: 7274MiB / 32018MiB 
         `---.``   ``   `.---.`
             `..---+/---..`                                        
                                                                   


da-avy-girl@DaFemboyPC-Aron:~$