Transparency with AR Quick look on iPhone

if you want transparancy in the model then export it as a Dn file but for transparancy in the background I'd use an Obj file i.e, removes the background and just keeps the basic parts

now for jumping around between different 3D software Obj is the best option [by a long way] because Obj is the old standard that every software can use... Dn is so new that even Adobe Dimension has issues reading it

Dn use only white background instead transpareny fo export. Unfortunatly no.

Workaround is to render Photoshop or bitmap fileand edit it in PS.