Good day!
Was global version 9.5.13.0 OEAMIFA, put Xiaomi EU 8.7.26, everything is fine, there are no problems, only does not see Wi-Fi 5.1, all settings revised, did not find how to fix it. On global version Wi-Fi 5.1 was. Just trouble, help, please.
I met the same problem last week
Do you format persist partition in twrp?
If so
Find the persist.img from the official rom and then flash it
It should be able to fix your WIFI problem