What is the effect of StandBy mode on battery health?

I have just downloaded IOS 17 and started using StandBy mode on my nightstand and desk. This means that I end up leaving my phone charging the entire day and rarely letting it get below 90% charge. This seems like it isn't good for the battery and would cause it to deplete faster. I wanted to find out if I should rather stop using it so often or whether Apple has accounted for this with some software block to stop it charging when it is on StandBy mode. Any information would be appreciated.