On this page https://doc.e.foundation/devices/sweet/install this version is recommended, but this is a recovery (.zip) version, not a fastboot (.tgz), is that correct?
I had “learned” that you take the fastboot version and install it with the MIUI Flash program.
If I now do an update via the original system, I get a version that is more current than the one given here and then I may have problems switching to Custom Rom.
Yesterday I “requested” that the bootloader be unlocked, now I have another week before it goes further.
Thank you
How to install eOS on Xiaomi phones German/English with many screenshots https://abc.l1nux.org/index.php/s/e88CGzkQFwMBr7t