I flew out of MUC last Thursday (12 Oct), going back to the USA. So I can't speak for a transfer, but I can share what we went through, at Terminal 1:
screening (check your passport and ask questions) at the entry to line for airline check in for bag drop. Then they check ID again as you're checking the bag at the counter, obviously.
Security screening to enter gate area ( TSA style screening): which the slightly terse Security screener wanted:
Yes they want your liquids in a bag and taken out in the tray.
Big garbage bin piled with bottles with water I observe, right next to the screening start. Somebody came to collect it for the bottle deposits.
And all your electronics (phone, laptop, tablet).
Jacket off. Cardigan (Strickjacket) off.
Anything (no paper, no metal, no candy) in pockets out.
Masks (if you're masking) off.
For my dad, they wanted his belt off (arrgh).
Shoes can leave on. The beleaguered dad with the infant in front of me, could carry the baby through.
They might wand you, do a pat down. Otherwise it was just the metal detector or body scanner options.
About a few feet later, it was passport control (bigger line because everyone going in unless you have EU passport).
Now in gate area (maybe walk a long way to your gate, have we walked to Austria yet?). Got to embarking gate, another passport check (fast).
Then a final boarding pass scan (not looking at passport) as you board bus (if you are in this situation) to the tarmac for the plane.
Granted, this all occurred days after the Israel Gaza strip situation was evolving, so I don't know if that had any effect.
There was no distinction in lines for business or non-business travelers. Everybody went into the same line.
I'm a Global Entry traveler and US security was a breeze in comparison, but I expect there to be more scrutiny at security in airports in general. I notice they have been really checking powders.