those softwares are released with their own installer ( davinci resolve for example )

perfect

there is a store for them called appimage pool which is written in flutter and its also an appimage itself. https://appimage.github.io/AppImagePool/

yes appimages are good but my problem with them is that when there is a new version i should download them again and again…

yes flatpaks are great but their only downside is the download size of an application