Try Mr @woziwrt image its a great better than Official OpenWRT images (snapshot or Stable 24.10) where they are giving you a bad performance to be honest .
one of major issues not solved on Offical OpenWRT BPI-R4 (bottleneck CPUs ) I reported it before 8 months not solved until to now (I opened the ticket before 8 month on Openwrt Forum & github (Not Solved until to now ))....when you are doing speed test or downloading the large files you will face speeds limitations
also I'm facing wifi speed limitations on devices that has wifi QUALCOMM chips ... I reported this issue on OpenWRT forum before 4 months and I opened the ticket before a month on Openwrt github (Not Solved until to now )
So you will find a lot of issue not solved with Official OpenWRT and some of them solved .
but with image SDK that developed by woziwrt ( I didn't face these issues)
one issue I faced it the speeds are not stables always on WIFI but on ethernet they are 10/10