It's easy if Someone(tm) has already set up a system where you can whip up the relevant bits with something like localstack.
But if there is no support from anyone and you'll be starting from scratch, you've print-debugged and fixed the issue before you get the debugger attached to anything relevant.
I suppose in the description of "large corp" and service mesh, Someone would already exist and this would already have been worked out. It would be a nightmare dealing with hundreds of microservices without this kind of game plan.
But if there is no support from anyone and you'll be starting from scratch, you've print-debugged and fixed the issue before you get the debugger attached to anything relevant.