In https://docs.couchbase.com/server/current/install/install-ports.html#map-custom-ports it is said:
Most, but not all, port numbers used by Couchbase Server can be remapped from their defaults to fit the requirements of your network environment. Refer to Table 2 for details about default ports and whether or not they can be remapped.
In Table 2, there is nothing that mentions which port does (or does not) support remapping. This info is missing inside this table.
Please complete Table 2 and add an additional column to know wether or not each port mentioned supports remapping.