Are you a thin TPU film protector with a thicc case. The films are usually very cheap but can require skills to apply. Usually the shops charge you a lot of money just for the labor cost. The thicc case is.. well thicc, e.g. Otterbox.

Or are you a tempered glass / thin case? Tempered glass are expensive up front but they are so easy to install these days. Most came with a tray to help.

Or even tempered glass / thick case for that maximum thiccness?