I also have a S20 FE and can attest to the bloatware they install with each software update.

Samsung is pretty much notorious for this, especially in developing countries where they bundle in every third-party service, PayLater app, shitty mobile game, etc alongside a new device. The only reason they are seen as preferable is that other companies are doing worse (see: Xiaomi).

No joke, the answer is for her to stop watching YouTube. I drastically reduced my YouTube consumption from like multiple hours a day to max 30 minutes. The algorithm takes into account how many hours you’ve watched per day.