I am sure it should work, maybe a formating error in my instructions..., let me show you how it should look : use nano
/home/umbrel/umbrel/app-data/lightning/data/lnd/lnd.conf

add these lines at the end:

[protocol]
protocol.custom-message=513
protocol.custom-nodeann=39
protocol.custom-init=39

are you hybrid node ( clearnet also) or tor only?