I talked to u/Known-Pen-1784 today and he said his is working fine at 90hz native! Nice and helpful person.

I am buying the same cables and repeater he has and hoping will have the same success. I'm in the US and the repeater unfortunately is only showing available from UK so I'll have a bit to wait on it to arrive.

Repeater: LINDY Extend DisplayPort 1.4 UHD Signals Over Distances up to 35m ASIN ‎B086WWJ6KFUSA: https://www.amazon.com/gp/product/B086WWJ6KF