How can I stop Asus ZenFone 7 Pro from killing my apps?

[vc1300]

How can I stop Asus ZenFone 7 Pro from killing my apps? I find it very annoying that even though I have 8 GB RAM my phone keeps killing my apps that I leave idle (even if there are just 1 or 2 of them).
I've disabled all related settings I could find like Hibernate apps, Battery optimization etc. but it's still happening.
I've read on the internet that there's an app Power Master where this could be disabled but I couldn't find Power Master on my phone.
Any ideas?
Thanks!

Model Name: Asus ZenFone 7 Pro
Firmware Version: Latest
Rooted or not: No
Frequency of Occurrence: Every day
APP Name & APP Version (If your issue relates to the app): n/a

[_jis_]

Ask the moderators to move your question to the correct forum.

[vc1300]

@Gustav_ASUS Could you please move this to the correct forum as per the comment above? Many thanks!

[Gustav_ASUS]

@vc1300
Make sure 'Background app management' is disabled in Battery settings.

[vc1300]

@Gustav_ASUS I don't have such an option, I have "Hibernate apps" which I disabled to no avail.

[fear_dot_com_20]

Here it is:
In the battery menu -> detect battery draining apps. There you have 2 options, one of them being not to kill apps.