I have a shortlist of five app icons at the bottom of my home screen, usually Phone, Messaging, Chrome, Google and Camera. These tend to remain constant (I've not seem them change).
When I swipe up to access my recently used (or in-use) apps, there is a different set of five app icons, and these can change - they can change to apps I've not used in a considerably long time, such as Calculator, Photos etc, and can change even while I'm working on something else; for instance, the set of apps has changed three times while typing this on my phone to include my Settings app, which I've not accessed while typing this, as well as reincluding my phone app, despite not calling anyone on my phone for several days, then replacing it with my Files app icon, despite me not downloading/opening any files.
Swiping up again gets me to the app drawer, with whatever five apps were present shortlisted at the top.
What are these "five app selections"? How are they determined? Why are they (seemingly randomly) changing? Am I potentially infected with a virus my phone's AV can't detect and remove, and someone is accessing these apps?
Device - Motorola G7 Power, Android Version - 9/Pie(?), Launcher - Standard OS?