I cannot find Lineage OS for Mi 10 Pro. I think it's not supported. I saw it for Mi 8 an Mi 9 but no Mi 10.new xiaomi.eu roms are only available as long as new China roms appear. The phone has now been on the market for 3 years and will therefore soon be removed from Xiaomi support. I have no idea who will then be making new roms. Maybe Evolution X will continue ( yarpiin has announced that he will release about 10 new roms ) here in the forum a current Lineage OS version is also offered which is probably quite up-to-date.