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Well it is a choice. They COULD have made the update system as a primary version and then a series of deltas. The flipside of that would be that any reinstalls or new installs would require to first load the old full and then maybe scores of updates, installing all in the same partition, and this could be slow. And it would add some extra complexity in generating and applying the deltas. It is much simpler to just have a source that builds a total, and then distribute that, despite the extra traffic, and slower installs than the delta could have given, if it started by making a copy of the running partition and then applied the delta. 

The point is that the updates are not incremental. The weekly OTAs each time contain the full ROM, even if changes relative to the previous one are minor or non-existing. The idea behind the a/b partitioning scheme is to keep the previous version of the system intact for backup, while flashing a completely new version of the OS to the respective other slot with every update. This is to make sure one of the slots always contains a working OS, even in case of a bad flash or faulty download.

The strange thing to me was having two 22.2 updates of 1Gb each and i was not sure if i should go trough

I've had this [almost] exact problem with my F(×)Tec Pro 1 back since mid November of 2022. After getting the phone brand new and using it for 2 & 1/2 years (yes there were a few accidental phone drops from small heights that produced only miniscule aesthetic scuffs on the corners): it was still in near perfect condition minus only one of the symbol switching keys not working on the keyboard. So that's some context, yet other than that it was in full perfect working order (in a condition of slight use) without any screen cracks nor damage (aside from what's aforementioned). Took it to cell phone repair shop after cell phone repair shop in North America (between some cities in Canada & the USA) to try to get it diagnosed then fixed. Even in the very international city of Toronto (& its GTA) multiple repair shops simply couldn't wrap their heads around the "complex" UK technology within the phone. So they said without knowing much on the phone's unique British assembly, that all they could do to get it operable was as follows: a complete memory wipe from a full reset via unlocking the phone; to which I declined (not wanting to lose what data was stored on the device. If you're backed up this might be the solution for you. At any rate after losing hope for a couple years that I could ever get past this reset / restarting screen [QFIL Mode as you put it(?)], I only just very recently exhumed the phone and contacted the customer service email F(×)Tec provided @ the time of shipping — some 9 months later (blame The Pandemic) after it had been pre-ordered. So just the other day I sent F(×)Tec a couple emails about the issue, thus whence they respond; back I'll forward their response here in an attempt to help us both work through this seemingly frustratingly Impossible issue. Kindest regards, –Đầńΐǽ𝖑 P.S. if you are able to get any  troubleshooting screens to come up again please take pictures of them and upload them here if you can; as mine just constantly reboots and that page doesn't even come up anymore. Hopefully we can all put our minds together to shed this paperweight; God willing.

Remember, the updates are not just what is being added... they are the whole package with the updates integrated.  (They don't disturb your settings and data).