Can software and hardware systems extract data from incognito browser pages?

I am interested in both before and after restarting the phone, and after I close this tab.

I want to keep my messenger accounts in incognito pages so that I can quickly and seamlessly log out of my accounts.

I also want to set my phone to restart after 10 minutes of inactivity.

Another problem is that I don't really trust web programs from the point
of view of developers and website substitution. Is there a way to
protect myself from this? Or find another solution to my problem.
Telegram messenger

Translated with DeepL.com (free version)

You need to specify what phone you use and what o/s. If you use any standard iPhone or Android I think your are beyond any help.

what he said ^^

forreal bro. if you're using a mobile device and fucking telegram, you've already fucked yourself

Potentially it can extract any data. Depending on many factors it is may be an issue with high or low probability. It really depends.