The engines I’ve seen with hydraulic lifters do not have anything to adjust.

Unless you’re talking about cleaning out the oil ports when they start to stick, but I wouldn’t call that an adjustment.

Could you give an example? I’m curious

(Not a professional, just interested in cars)

I wouldn’t say the computer adjusts the valves, variable valve timing serves a completely different function than an old fashioned valve adjustment.

It’s true that most lifters are hydraulic nowadays, and self-adjust by filling with oil. So your point still stands, it’s just mechanical, not computer controlled.

My 2017 Honda V6 does require valve adjustments, but I doubt many people actually do it themselves though. And most people probably don’t have it done at all.

(I’m a hobbyist, not a mechanic, so anyone feel free to correct me if I’m wrong)