The Xiaomi Pad 5 (nabu) is not officially supported by the LineageOS Android Distribution (LOS): Thus, the chances of an official /e/OS are extremely low.
But don’t underestimate the quality of the so-called Unofficial CustomROMS from @ronnz98. If the device is running, they are on a par with the official /e/OS ROMs. Well, the update has to be done manually, but it is easy and without data loss.
UNOFFICIAL BUILD] Xiaomi Mi Pad 5 (nabu) for /e/OS-T by @ronnz98