I’m a full service glass shop so replacement/repair is bulk of what I do with HLR as a big upsell.
But to answer your question I am always looking for additional revenue. The easiest way for me is when I’m doing a preinspection on a car and chatting with customer. You find other things that need fixing. Window regulators, motors, door switches, lock assemblies , handles, wiper motors, side mirrors, defrost tabs etc.
I’ve even replaced grilles, fog lights, turn signal housings, outer body trim, headliners. Mind you I’ve been working on cars my whole life, particularly customization so it’s easy for me to do anything on a car.
If you can do the work correctly don’t be afraid to mention it.
Worse they will say is no, but you’d be amazed at how often it is a yes.