Prevent MacBook from lowering the CPU speed with a damaged battery

I have MacBook Air (early 2014) with Big Sur installed as an emergency.

And it happened, I lost my job, work laptop was taken back, and I had to use my emergency laptop.

The battery is damaged, it does not charge at all, so the power adapter needs to be connected all the time.

Something tells me the MacBook is slower the listed CPU speed because the battery level is constantly on 0-1%, even if it is charging from adapter.

I'm not sure if it is a problem, ideally I can buy a new battery and try to replace it, but I'm not sure it will solve the problem, and I'm on a low budget during my job-hunt.

Is there any way to check the CPU speed level, and is it possible to force MacBook to not decrease CPU speed?

Many Mac laptop models throttle the CPU when the battery is not capable of supplying enough power (or if it absent or faulty). It is not possible to overcome this. Otherwise the Mac would (sometimes) want more power that the charge cable can provide.

Is it possible to disable CPU throttling on a MacBook Pro with a completely dead (not recognized) battery?

Why does a MacBook throttle without a battery?

CPU throttling on Macbook with bad battery and Catalina

I know this a bad time to be outlaying cash, but you either need a new battery, or a new Mac.