Let me endorse these guys. They’d offered their scenery package for X-Plane earlier, and they just finished porting it to FS2020.
It’s a fantastic work adding many must-have landmarks to Budapest, and two small sport-airfields. I gave it 10 stars like other reviewers on the linked site. They will keep adding stuff, and all this is free!
https://forum.thresholdx.net/files/file/735-hungaryvfr-fs2020/