Laptop plugged in fully charged in Sleep constantly warm

I have an issue with a new Lenovo laptop and I'm trying to troubleshoot whether this may be related to power settings in Windows and its handling of Sleep or something else.

The reason I even suspect Windows at all is because my install(Windows 10 Pro x64 22H2) has been cloned from my previous laptop and is not a fresh install. I had several issues I had to work through as a result that took several days, including one where the laptop would immediately go to sleep when unplugged even with full battery(now resolved) and a whole lot of power options missing from the power plan in Control Panel(also resolved).

What remains now is that leaving the laptop plugged into the charger overnight it remains quite warm at all times. In my experience with phones and laptops once a device has finished charging, it cools down, and if it's in sleep the infrequent, brief power draws to refill the gradual battery discharge are nowhere near enough to make it heat up. This laptop however feels like it's undergoing a constant battery charging operation.

Looking at the battery when plugged in I notice that the battery is rarely ever at 100% and tends to hover around 93-98%. I first assumed this is some protection mechanism since I know charging a battery in a manner that prolongs its lifespan involves not keeping it at full charge all the time and allowing it some leeway to discharge. But this doesn't look right. I also can't imagine it being good for the battery to be constantly warm like that.

Please help me troubleshoot the sleep states and battery behavior of Windows, so I can figure out whether this is the OS's fault or something else.

I went to investigate the issue deeper and now have extra information:

My last laptop was bought in 2012 and I use my desktop mostly, so overall I am disconnected from the happenings in the world of laptops. Looking into this issue now, it appears that my laptop has what is called a "Modern Standby", in which it operates more like a phone when locked than going into proper sleep.

I am very displeased to discover this. And I find it insane that the decision was made to add this mode as mutually exclusive with Sleep and deprive users of the ability to use it!

Apparently some Lenovo models have the ability to enable advanced BIOS settings with various key tricks, I have tried all of them and also read that the feature is not enabled for all models and sadly it does not appear to be on mine either, which means I have no way to enable true S3 sleep outside maybe a risky unofficial BIOS mod so for the time being it seems that I'm stuck with S0.

Are there any further things I can attempt from inside Windows to get S3 nonetheless? If not, how can I make this mode maximally efficient? I had to take manual steps to add the option to disable network on standby, which was also missing from my power options. What more can I do?

I went ahead and added the power option to disconnect from network when in standby because it and many power options were missing once I moved the OS over and I gradually re-added them as I needed them. This should disable network traffic and related shenanigans that might suddenly decide it's time to pull data or do updates. I suppose that's the best I'm gonna get under """""""modern""""""" standby. Bummer.

"My last laptop was bought in 2012"

You cloned that for a 2023 Laptop, that is absolutely ridiculous.

You have to download the Recovery Media from Lenovo and use it. That will restore the Laptop to the bought condition.

I have a 2014 Laptop and a new Lenovo laptop (2022) with rather similar hardware.
There is no way I would ever do what you have done.

Seriously, you have totally wrecked it. That is being honest, also assuming you are not a troll spamming nonsense.