macs-fan-control VS charge-limiter

Maybe Macs Fan Control is close enough https://crystalidea.com/macs-fan-control

You can make device cooler by manually turning on the fan and tinkering with the RPM of fan to make it run cooler when running games. Macboook by default does not turn on the Fans until its over 90 degree. You can use this free Fan control software. I have been using it and my mac runs cooler when gaming and such. https://crystalidea.com/macs-fan-control

install Macs Fan Control or TG Pro and see if you can get the fans to start up again after wake.

Get Macs fan control, the built in temperature for when the fans kicks in is very high. https://crystalidea.com/macs-fan-control

Knowing how one might reproduce an issue doesn’t mean the cause is failing hardware. Apple Diagnostics may be able to tell you more, and Macs Fan Control can tell you if the fans are in working order and you can make them spin faster if you want.

However if do have your heart set on the macbook make sure they have at least cleaned it out and repasted the CPU. It should take care of the overheating problem some what you can use like Mac's fan control to get a bit more cooling out of it https://crystalidea.com/macs-fan-control It's what I use on my 2012 mac book bro which is way older.

Charge Limiter https://github.com/godly-devotion/charge-limiter/

With my MacBook and Dell Laptop, I have been able to use a power manager (in the case of the Dell) or scripts (in the case of the MacBook) to limit the charge level to 80%. It is my undertstanding that keeping a Li-Ion battery at 100% constantly is Not A Good Thing - which laptops plugged in over the course of a working day would almost certainly produce. This effect I think is more significant than charging to 100% and then switching to battery power immediately (to reduce the time spent at 100% to an absolute minimum) - which is what Apple offer with their iPhone optimised charging. That they do this does confirm that not doing something to limit the time spent at 100% is detrimental.

I know it obvious but get a bigger tray ! I found this that would fit , depending on the processor you have heat accumulating might be an issue with this tray... more over if you're gonna keep your laptop connected to power I recommend using this script to limit charge to 60%

Use a tool to limit the max charge to 80% and don't let it drop below 20%. It will be fine for many more years.

An alternative to AlDente is Charge Limiter.

Although my laptop wasn't used much, I never left it plugged in for long time and occasionally discharged it. I also use a charge limiter and keep it at 48% for when it has to be plugged in at a desk.

I have seen this, but have not tried it.