So, the claim was made that 3 full days was always the expectation. Not just more than half. Check this
https://iris.cigna.com/business_units/global_workplace_/global_workplace_officesclinics/stlouis_mo/location_documents/stl_site_team_standard_faq_090623pdf
The answer to #37 reads, in part:
"You have an option to work at home 49% of the time..."
What a wonderful culture they have established for us.