Our constitution does not state this, the media is the only reason that you believe it does. The 2nd amendment is written as follows:
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
You are also using the wrong definition for regulated. That amendment was added in 1791, not 2019. Here you go:
Regulate
REG'ULATE,
verb transitive
1. To adjust by rule, method or established mode; as, to
regulate weights and measures; to
regulate the assize of bread; to
regulate our moral conduct by the laws of God and of society; to
regulate our manners by the customary forms.
2. To put in good order; as, to
regulate the disordered state of a nation or its finances.
3. To subject to rules or restrictions; as, to
regulate trade; to
regulate diet.
and Infringe:
Infringe
INFRINGE,
verb transitive infrinj'. [Latin infringo; in and frango, to break.
See Break.]
1. To break, as contracts; to violate, either positively by contravention, or negatively by non-fulfillment or neglect of performance. A prince or a private person infringes an agreement or covenant by neglecting to perform its conditions, as well as by doing what is stipulated not to be done.
2. To break; to violate; to transgress; to neglect to fulfill or obey; as, to
infringe a law.
3. To destroy or hinder; as, to
infringe efficacy. [Little used.]
The 1828 dictionary was the oldest I could find. We have to interpret agreements based on the meaning at the time of writing, otherwise you could change the terms just by changing a definition, and at its core, the constitution is an agreement.