exactly. i have absolutely no clue. i compared my gpo settings, but they are the same. win11 24h2 is brand new installed. 23h2 is running for over a year now without changes (gpo). i assume some kind of dependency of hardware, in special gpu. ok, my 4. system, also windows 11 23h2, same issue, not available. but that has changed except ssd the complete hardware. upgrade. but its the same hardware as this computer with 23h2. thats what i dont get. very same hardware except gpu (this one is older) and here it works, with the better gpu it do not work. it cant be a gpu isse. i also disabled gpo settings, still no avail. edge://flags has no option for me, switches from v137/138 do not hold such option. what i read theses days, that MS is developing a "cuter" design for edge. maybe they have dropped the new design - but this also do not explain, why 23h2 is treated this different. a search engine did not help me out at all. curious. but well, i dont like the new appearance with floating tabs. firefox as my default browser has also no floating tabs. it had, somewhere around version 44. ugly. image it should be in the lower box.
MS does a lot of A/B testing in Edge before deciding on, and final roll out of, new features (usually bloatware features!), so one user has X feature or design change, and another user has Y.