Flashing /eOS ‘Q’ V.14 GSI on a Xiaomi Redmi Note 12 Pro Plus 5G (ruby) will not be successful. Also, a /e/GSI “S” or “T” is not to be expected in the medium term [ “we do have developer bandwidth issues” ], if at all.
However, it’s possible to upgrade to the current stock Android 13 ( V14.0.1.0.TMOMIXM ) and for example a GSI “13” ( lineage-20-light or lineage-20-td ) from the GSI Guru Andy Yan. Andy Yan’s personal builds support ‘Signature spoofing’ and thus operation with microg/GmsCore - as with /e/ OS - is possible.
It’s always worth one or more GSI installation sessions to free yourself from Xiaomi’s clutches.