Iran as a member of Non-Proliferation Treaty (NPT) has the right to enrichment at any percentage (eg. >90%).
Now it is worth saying that also as a member of NPT, Iran has the right to activate article 10 which gives Iran the right to also build nukes since the country is being threatened by regimes armed to the teeth with weapons of mass murder including nukes.
NPT article 10 is not a right they activate to allow them to make nukes...
there is
onno article 10 right to make nukes within the NPT
article 10 is simply to no longer be in the NPT
its a exit of NPT.
then when not part of NPT they are no longer forced
/conditioned to not make nukes... because they removed themselves from the NPT
this is not the same as activating a right to make nukes as part of a NPT deal.