Does anyone know of any limitations when using Word on the iPad Pro, especially using VBA, content controls, etc?

Anything Mac provides little or no support for content controls, and none for ActiveX controls.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

When you say little or no support, does that mean content controls (and ActiveX) won't work at all on a Mac, or only that Word docs with those functions cannot be developed on a Mac?

On PCs, content controls have been available since Word 2007 (checkbox content controls from Word 2010). Content controls don't work at all on Mac Word 2011 & earlier (rather like PC Word 2003 & earlier) and, for Mac Word 2013, all content control development had to be done on a PC. Starting with Mac Word 2016, content controls can be added to a Word document. See: https://support.office.com/en-gb/art...8-CEC300136B82
Relatively few Mac users would be on Word 2016, though.

ActiveX controls have never worked on Macs.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]