Is completely normal to not have any Jetway replacement files in MSFS 2024. This is how’s supposed to be, because we still don’t have a dedicated package to replace jetways at default 2024 airports, so you can’t use them yet.
The difference is that, with the previous version, if you had both 2020 and 2024 installed, you were forced to disable GSX jetways in 2020 as well, now they are separated, so you won’t lose those in 2020 if you have both simulators installed.