Also most VBA code already written is inherently locked into the windows API and COM framework so isn’t multi-platform by design. Code written in VBA on Excel for Windows often doesn’t port across to Mac without errors because there is little abstraction from the host OS. That’s why the replacement technology is a cross-platform JavaScript API for Excel (that will eventually allow fully cross platform macros).
It does have WinUI integration via winforms, but again porting winforms to mobile and web would be a huge technical challenge and be very ugly (or break compatibility).
