UPF 2.0 LRM Incorrect for "source/sink"

UPF 2.0 LRM where source and sink options being explored where user can write the power-intent
with the help of supply-sets.
It is seen that
for set_isolation (UPF command which is used to specify isolation strategy) and
set_retention (UPF command which is used to specify retention strategy) commands,
source and sink options ask for relevant supply-set name with the help of which crossings from one domain to another are linked to the relevant strategies but

for set_level_shifter (UPF command which is used to specify level-shifter strategy) command,
source and sink options ask for power-domain name.

This is inconsistent to the concept of supply-set and there usage.
Also this will retrict the convergence of UPF and CPF to single plateform.

Please share your thoughts.
and tell me where do the users of UPF, can raise LRM related issues and needs correction.