Both fw version 01.00.0800 & 01.00.0700 have the same ARB value (3) as 01.00.1000... so you should be able to roll back to either of them.
Use...
... & either try downloading the .0700 or .0800 directly in the Drone-Hacks app or use...
What's the problem with DJI's intended app for the Mavic Pro... DJI GO4?
Since several years now you don't find it on the regular app stores... you need to get it directly from the DJI site & sideload it to your screen device.
Get it here for...
Check out the user manual for the OP's Mini 2 at page 14... or maybe page 47 from a newer Mavic 3 Pro or page 44 from the Air 3S. Look up the chapter Low Battery RTH.
From what I've seen over the years, all Mini, Air & Mavic iterations have it...
That's not entirely correct... before the forced critical low voltage auto landing gets initiated, a low battery RTH will kick in.
The low battery RTH will give you a 10sec counter before proceeding where you can chose to either RTH or cancel...