Tnx Darksky! Todays snapshot is snappy; no more latency when loading webpages.
For a snapshot with Luci: go to https://firmware-selector.openwrt.org/?version=SNAPSHOT&target=mediatek%2Ffilogic&id=xiaomi_redmi-router-ax6000-stock
Choose: Customize installed packages and/or first boot script
And add the following packages to Installed Packages: luci-ssl uhttpd luci-mod-admin-full luci-base libiwinfo-lua luci-theme-bootstrap kmod-mt7986-firmware