There are some more critical, technical SEO elements which can only be assessed with GA4 and GSC access.
Technical compliance
Crawling errors
# 404 pages
# of pages with Title errors
# Non indexed pages
# Orphan pages
# of pages with Description errors
Duplicate content
Schema mark up
# of pages with Alt tag errors
Duplicate/missing Titles
Site links & rich snippets
# of pages with canonical errors
Duplicate/missing Descriptions
# of pages with Duplicate content
Anchor text quality