Ah thank you

Yes, I see why you'd recommend PowerApps. Though, when my colleague tried them as a Desktop Application, they were limited to a phone-like view.

Anyway, thanks for pointing out the admin console option, I missed that one.

I tried it, though it doesn't seem to relieve the issue. Here are my iframe 'sandbox' attributes after disabling the Thirdparty iFrame prevention:

allow-scripts allow-popups allow-popups-to-escape-sandbox allow-forms allow-same-origin allow-downloads