Google Search Console EXPERT

Measurment Solutions, Inc. An International distributor of industrial products specializing in measurment insturments is in need of a Google expert. Our website once enjoyed regular daily traffic and orders but recently, about 6 months ago extentions in a magento website became out dated and un supported so we deceided to upgrade our Theme, Our server, and the version of magento. ( currently 2.4.3). Since then we have seen little to no traffic and zero orders – So after doing a little research on our own we discovered the majority of our website isn’t even indexing with Google. We are in need of some help in this department