Apps keep reloading?

I have a new cell phone, a Sony Xperia X. My only problem with it: unlike my previous cell phone, almost every app that I put in the background for only 5 seconds has to be completely reloaded when I click on it again.

I'm used to switching between 3 apps without any problems, which then remain in the state I left them on.

But with this mobile phone here, if I follow a Netflix, for example, or a YouTube video or an app game, and then switch to another app or just to the start screen, then EVERYTHING has to be reloaded and I do again land on the "start page".

Very few apps continue to run normally in the background

Can you do anything there?

All updates on it, since the Xperia X is older. Maybe also take a look at the data protection settings to see what it says there? Do you have an app that needs a lot of power?