I have couple of stainless steel chain straps which i ordered from aliexpress before the pandemic, they are of excellent quality and I am satisfied with them, I personally like chain / metal straps. For protection I am using a simple screen protector as I don't like those rings and bulky cases which are available and using such things will kill the beauty of the watch so I am keeping it simple, BTW the watch glass itself is scratch resistant..just my opinion..
Lastly, yes there is a method of side-loading BP feature is available on XDA, but my those days are gone when I used to do such experiements, now I hardly get time for such activities
if you try that, do let us know about the BP feature!