OMR is using a SOCKS for proxying TCP over MPTCP.
Glorytun UDP is a VPN, choosing that in OMR will disable MPTCP and the proxy, although the author seems to have dropped the support for the reasons below.
OMR is currently using a an optimized fork of a very old version of Gtun TCP[1] to tunnel non TCP streams over the bonding proxy. Gtun UDP doesn't reorder packets nor auto adjust weight making it effectively poor when using different links, not an issue if you're using same ISP and equal hardware. QUIC is also blocked due to the large overhead : MPTCP->SOCKS->TCP->UDP<-Client Any UDP service/streaming will perform poorly as a result.
There are few MLVPN forks for non-equal WAN bonding and seamless failover, "UBOND"[2] does not require preset speed for each WAN, nor reorder buffer tweaking.