Here is a direct quote from the Xojoª Home page
"This means it is cross-platform, so you can build for any platform from any platform"
This however is a blantantly untrue statement.
Xojo supports SIX(6) Platforms, meaning there are 36 combinations
But as the below table show, only 13 of those 36 are true.
As a matter of fact, you cannot even DEVELOP on 3 of them!
Development Platform
Destination macOS Windows Linux iOS Pi Web
  macOS Yes 32bit No No No No
Windows Yes Yes No No No No
Linux Yes Yes Yes No No No
iOS Yes No No No No No
Pi Yes Yes Yes No No No
Web Yes Yes Yes No No No
So please don't be fooled by their "marketing materials"
Do your own due dilegence and find out for yourself