Cant Select/Edit/delete interactive Buttons, using Acrobat PRO DC

Hi, We have a large PDF document which needs to be edited with new pages built in indesign and slotting into the PDF.

The PDF has previous navigation and folios which we needs to delete in acrobat. The editing feature in Acrobat works fine for folios and other text frames but in the PDF we have some Interactive navigation arrows, probably built in indesign. But for some reason I can't seem to select these buttons. Does anyone know any tricks or tips to delete items like this in Acrobat.

Mac OS High Sierra

Acrobat DC

CC 2019

Thanks

Lister