read replica connection string doesn't work

hey all. we just added a read replica for an existing supabase postgres instance. i used the connection string with the password from the existing instance and we keep getting this error

getaddrinfo ENOTFOUND db.xxxxxxxxxxxxxxxxxx-rr-us-east-2-wfcla.supabase.co

is there something wrong with our replica? am i making a simple mistake? (I subbed in x's for our base instance id)
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