it clearly depends on the individual crew. At the risk of unleashing the Long Haul Crews vs Mixed Fleet crews, my last two heathrow to Toronto in First were the most underwhelming ever. Nice staff but totally unaware of the whole cabin, and seemed to focus on the first row. Not walking about checking - it's not like it's a big cabin. My last trip back last March I had a young lady - 21 yo max doing her first day in First - unsupervised, and whilst a great first effort - nowhere near the level required, and totally unsupervised by the CSMs (yes two of them both in club)
Long Haul crew whilst sometimes more cranky or set in their ways - are way better at sussing out each PAX's needs and delivering excellent service tailored to the individual.
I use the call button - it's why they provide it