Xbox One X turns off randomly while running strong or big games

check the ventilation of your console make sure there is plenty of room for it and also check for any dust build up or pet hairs etc.

the console has a safety feature built in that if it gets too hot it will shut down to prevent issues, so if you hear your fan either blowing really strong, or even not at all then there may be an issue with the heat sink and thermal paste and the console is overheating.

there could also be an issue with your HDD where it is failing if it is an older generation console.

I had to updated my console to install rdr2 to updated it an a couple of games, an now it's like it has a mind of its own turning off randomly, sometimes it Will turn off while it is stating up

Please see this page about randomly turning off as it has some tips on what to do:

https://support.xbox.com/xbox-one/console/console-turns-off-unexpectedly

It could be a failing power supply. That is covered on that page.

The Xbox Series X turns itself off randomly to protect itself from overheating or when there is no power.The majority of reports of the Xbox
Series X turning off appear to be related to next-gen games like Call of Duty: Black Ops Cold War and Assassin's Creed Valhalla.

Not necessarily fifa 21 xbox one version crashes and turns mine off so does fortnite

the xbox one x will not be running that game at those resolutions with that refrsh rate, simple, its one or the other, the one x is not that strong.

even if you select those settings it will not run 4k 60 or 1440 120.

it will give the illusion.

The Xbox Series X turns itself off randomly to protect itself from overheating or when there is no power.The majority of reports of the Xbox
Series X turning off appear to be related to next-gen games like Call of Duty: Black Ops Cold War and Assassin's Creed Valhalla.