I’m brand new to apple and honestly I’m trying to like it but struggling. Few issues

Is there a way to shut off alerts when I’m connected to Bluetooth and just get them through the speaker like a normal phone? Instead of through Bluetooth?

When your working on the phone, scrolling Facebook or reading emails, it doesn’t ring, it just shows a call coming in at the top of the screen. Sounds dumb cause your looking at the screen but my focus is typically on what I’m doing. Can this be changed?

The alarm has one loud tone then gets quiet, can that be adjusted?

My alerts and ringers aren’t very loud even with them turned up to the max, are there other volume settings on the phone?