Unfortunately Debian stable doesn’t ship our bugfix releases after the major Debian version gets tagged - KDE Plasma in Debian is currently at 5.27.5, and 5.27.10 was released upstream two months ago.
In other words, you’ll be experiencing bugs that have long been fixed… I’d advise to stay away from Debian for KDE Plasma because of that. If you want a Debian based distro with a good KDE Plasma experience, KUbuntu is likely a better choice, even with forced snaps. If you don’t need Debian though I’d recommend taking a look at Fedora KDE or Arch (derivatives).