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google the year and model. there are all sorts of options, e.g. replacement screens from China that have tech built in. Or different head units etc. Someone will have a Youtube video or a massive forum thread explaining how to (e.g. this 594 page monster for BMW that I have been looking into https://f30.bimmerpost.com/forums/showthread.php?t=1675929)
My current Alfa has had the OEM head unit replaced with an Alpine that has all the DAB, bluetooth, carplay and android Auto you would want. But it probably wouldn't fit in lots of cars.
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As others have said, replacement head units are a thing. I dd that in my last car and it was quite a lot of faff. I was advertised something like this today and I think if I was going down that road again I'd probably be checking aliexpress for whatever the best version of a low-profile dash-mounted option would be that doesn't need special trim-removal tools to fit and complicated hook-ups into your car's existing electrical supply etc.
adding car play to older cars .. talk to me? where do i start?