Option to add restrictions on the page at the time of approval is approved should be available as a sub-option for the ‘Approve the current version of the page’

Add the ability to enable this option globally - Enable page restrict

if the option is enabled at a higher level, by default it is checked at a lower level (definition, page level when parameterizing approval), it can be disabled

After setting page access restrictions - all people with access to the given space should have read-only access to the page

Change of access restrictions can be made only by persons who have access rights to this operation