You'd be best to discuss that with your processor and your partner as my friend Scott suggested, RMS is the means to process the transaction. What can and will work with respect to devices and payment methods need to be tested and validated by the backend merchant processor. I'm sorry I can't answer that with a yes or no. I do know that Retail Realm and perhaps others have You tube video's up which demonstrates their integrations with RMS. Ed is also correct, the Ingenico ISC 250 and ISC 350 are also two devices used within RMS integrations. Perhaps they also have a video demonstration of how their integration works? I would certainly be interested in seeing it demonstrated. I dislike paying for things I can't eat, so having a 3-500 dollar device I already paid for sitting on a shelf and can't use, is kind of hard to swallow.
The device setup as I mentioned is anything but a cakewalk, and Microsoft can't support the devices so you will need someone to perform the integration. Who you choose, the associated costs and what they can and cannot do with respect to Android or Apple Pay?
That functionality, is completely dependent on the processor and their backend not RMS. (do they except Android and Apple Pay) if not, the device brand and model is mute.
I have seen neither implemented, but my assumption would be credit is credit and debit is debit. Since those tenders already exist creating a new one is likely not a requirement. Whomever implements it/configures it may have a recommendation of their own about the tenders. (perhaps for tracking purposes it may be a good idea?)
One question I would also ask is: Is this configuration done through TSYS within the RMS EDC configuration "or" is it done using the "do not use electronic draft capture". (within the RMS configuration)
Transactions done outside of EDC are supported only by the processor if you should have issues.
Transactions done within EDC and TSYS do allow you to have some additional benefits with respect to support. Microsoft and TSYS can and do offer customers support collaboratively with the processor, should you have issues up to a certain point.
( that's three sources of support you can depend on not just 1).
That's a very big plus in my professional estimation.
Thanks for the questions you are doing a great job researching, I'm doing my best to help.
I always feel better when I can see it before I pay for it, that's just me.
Enjoy your day.