MK0 ... if i have to install through flatpak then why bother with native packaging.
You are trying to install a Plasma KDE application on Budgie, a Gnome-based DE. Budgie, Gnome and MATE DE's are more-or-less interchangeable, all tied to the Gnome stack, but very different from the Plasma DE, which is not tied to the Gnome stack. In short, oranges and apples, or chalk and cheese, or square peg into a round hole, depending on your region.
I can't say for sure, of course, but the chances are high that you are running into a dependency issue related to the differences between the DE's.
Flatpak installation eliminates dependency issues because a Flatpak includes all required dependencies and does not disturb existing dependencies. That's why, as @mpiekp noted, it is probably "Better to use flatpak version, if your not running the plasma desktop."
The dependency issues work the other way, too. Installing a Gnome application in Plasma is an invitation to trouble. Better to use a Flatpak in those instances, too.
Solus "bothers with" native KDE packages in the repository because a significant number of folks using Solus use the Plasma DE and use KDE packages. Just a guess, though.
My advice: Don't try to make oranges apples, make chalk cheese, or fit square pegs into round holes. If you are using Budgie (or Gnome or MATE) avoid KDE packages, and vis a versus.