iPad Air 1 running iOS 12.5.7

Looking for activation lock for this device. I’ve had this device for many years, it’s been on my display. Wanted to use it briefly but its iCloud locked. Can’t remember who gave me it to unlock it.

I can jailbreak it with checkra1n but when I’ve tried checkm8 beta 1 it just seems to disable lock the Home Screen so I can’t get past it