Flatpack apps performance on Linux Mint
Star Trek TNG Intro but with Enterprise Lyrics
Mono Puff - Backstabbing Liar (Alternate) HQ Remaster
Which song did you buy the Istanbul (Not Constantinople) EP for?
(Cue mysterious banjo intro to "Journey of the Sorcerer" by The Eagles)
If SNW people go through with a TOS continuation, where will they start?
SNW S3 E7: The Guy Who Didn't Like Vulcans
If I had a slip of latinum for every time a Starfleet officer stole a blue mid-1990s Dodge Ram pickup...
What do these 3 /(?:United Earth|Star) Fleet/ Officers have in common?
My best guess is that it's not a Flatpak permissions issue as others are claiming; the software is just trying to use your iGPU (which is usually crappy) instead of your dGPU.
Try taking whatever command you use to start the program and tacking
DRI_PRIME=1on the front. This has often worked for me on applications regardless of whether they're native or Flatpak.