Is There Any Issues to Charge iPhone 15 with Apple 30w Charger?

I am Planning to Buy a iPhone 15 and currently I have MacBook Air M1 and apple 30w charger which comes with the MacBook. so, is there any need to purchase 20w charger for iPhone 15 or can I charge it with apple 30w charger which I got with MacBook..

I Heared few myths from Friends that charging with high power adapter may lead to faster battery health decrement is it true

or I can charge my new iPhone 15 with 30w apple adapter..