Fairly? You joined yesterday. You could hardly be fairer.
The good news is that since it is bootlooping, the bootloader is probably okay.
For this model device running android 9, neither of the bootable partitions can be modified (while still running the original bootloader), even if the bootloader is unlocked, without causing a signature check failure. Since flashing some twrp version has modified the recovery partition, which is a bootable partition, the signature check is failing.
One way is to flash the original recovery partition back to the device using burn mode.
By holding the button on the device. You'll need the worldcup drivers and command line "update" burn mode tool (not the GUI burning tool).
If you have a copy of the original recovery partition, you'd just flash that with the update tool and be done.
If you don't have a copy of the original recovery partition, you can use the update tool to dump a different partition, like system, in order to learn which version of the firmware is installed on your box. Report the version here, and maybe some member will have the matching recovery partition that you can flash to your device using the update tool.
