All OEM, as this is a recent drone. You can probably even find lightly used Mini 3 Pro batteries on eBay from people who crashed their drones or upgraded. Mini 4 Pro props are different, so you'll need Mini 4 Pro only.
Since DJI has suspended the service and I believe renewals are not available, I think they would know that everyone has attempted to renew and has failed. You usually get a renewal notice so you can respond to that if you get one; if not, not...