Here is a applmage for Freecad
https://www.freecadweb.org/downloads.php (913 MB)
It is 64bit.
I tried it in Fossapup64 9.0.5
Seems to work OK.
It needs to have exec permissions to run.
After downloading.
Right click on it.
Select properties.
Give it exec permissions.
Left click on it to run.
It took about 7 to 10 seconds to startup. So do not think it is not working when you click on it.
NOTE:
I know nothing about using this.
I guess you can ask and maybe someone that does will answer.