The transmission-daemon-mbedtls, transmission-web and luci-app-transmission packages used to be available on previous libreCMC versions.
It seems they were somewhat changed on OpenWrt master, but are still available: transmission, transmission-web-control and luci-app-transmission.
Could you please add them to the v1.5.3 package feed?
Still not available on the v1.5.5 package feed.
Any chance you can add it?