On your site to add a new channel you are asking to install https://wordpress.org/plugins/well-known-uris/ which I do really not understand. First of all, I never install a plugin which is last updated more than one year ago, second, why don’t you redirect to your own plugin which is Brave Payments Verification; third, why do you force me to use a plugin instead of DNS records?!?
Open source means, I have at least a choice !!
Oh, by the way, it seems that verifying a channel on Wordpress Multisite does not really work.