OP, your DD should align with her unit on options to proceed either on scholarship or as a college programmer in the unit and at the university toward commissioning next year, if she is not yet vaccinated by the stated May, 2021 deadline. DD should file her request for a waiver and ask for time until that is fully adjudicated including any appeals beyond a May deadline, if doing so on religious grounds is factual. She should be clear on consequences and the timing of her upcoming decisions.
Just note if she starts the scholarship but ultimately does not commission over this, she would owe all scholarship monies back. the 4 year scholarship has a free first year grace period. But this is not a 4 year scholarship.
I think you're asking a reasonable question in case the requirement changes in the future/ before commissioning etc.
Similar to the guidance I gave my kids when teaching them to drive, military can be an "I say, you do" environment. If I said "hit the brakes", the driver in training had to hit the brakes, not take it as an optional suggestion. Mr. Miagi had the same guiderails for Daniel-san. take some time to think about whether the military is a like-environment to that, or more of a democracy. if that hankles your feathers or whatever the expression is, then consider whether the Army is a good fit. In the corp world we call it "flouting authority" when someone does not follow direction - it's grounds for career derailment here too.
A lot of people are certain about this vaccine and whether to take it. I took it and the booster too but who knows maybe in 30 years those who took it will all drop like flies while those who held out go to our estate sales. in the meantime no need to negate what other people provide for your consideration - assume a positive intent that they are trying to help - OP you're coming across like a 2 year old who covers his ears and yells "you stink" loudly when he doesn't like what he hears in some of your responses.
Good luck to your DD - thanks for her willingness to serve.