Major appliance repair is very much still a thing, and manufacturers share repair info under their partner programs. But this makes sense because shipping them back for warranty is prohibitively expensive and people are willing to pay a few hundred bucks to fix a couple thousand dollar appliance. They’re still not doing component level repair, because module replacement is still cheaper and more reliable.

Small appliances and electronics are not repaired as any more much because:

1. their real price has cratered over the past 50 years

2. they have more integrated and specialized parts that simply aren’t repairable or available

3. They have fewer mechanical parts prone to regular failure or which pay the bills for repair shops (belts, timers, etc)

4. They are far more complicated than their predecessors, and therefore more complicated to diagnose even if you have a schematic

But yeah, when everyone’s washing machine has a belt transmission and a clunky mechanical timer, they failed all the time and there were repair shops on every corner. But these places weren’t doing the type of work akin to SMD rework on a digital circuits.