I think these are questions that you should straight up ask… tell him these are my values i.e. no physical relationship before marriage, islamic household to raise kids in etc. and ask him how he feels about these topics. If your values mean enough for you then regardless of the aging process I wouldn’t compromise on them but thats your call. Only you can judge how important these values are to you not just for now but for the future as well.
That being said I know a lot of guys who spent their youth with loose social morals but once they were older, married and settled with kids completely changed. Some of them were honest about the change and others did it because that was the expectation from them.