Really not sure on the number of sectors needed. If transitioning from one type to another within the same company, it’s 15 hrs with a training captain, and fewer than 8 sectors for sure.
To be clear, you’re not kicked to the curb or released to the line at 25 hrs, no matter what. If you need more time, you’ll get it, but you’re not getting 140 hrs of instruction. The last person I knew of who couldn’t seem to get it together was fired after ~80 hrs of line training.
As alluded to before, there’s probably more real-life exposure than the average MPL is accustomed to. Most will have spent some time flying singe pilot IFR, and into the same size airports they’ll be flying jets out of.
You also raise a good point about our focus on “doing things”. From reading here, I get the feeling our side of the pond is more likely to say “let’s see what happens, the worst case scenario is a missed approach”.