Ouch! This is a difficult one.

Just a note; these criteria usually come with a running node too. For instance, as far as I know, BTCPay, that is mentioned above and it's very recommended from me, requires you to run a node, which is an extra cost for your business. The specific one allows lightning payments too which is nowadays considered a must for the customers.

For an easy installation of a BTCPay server with extras included check Umbrel.