add-ons not transferring from windows to macOS

This is really annoying that I have to post this all because I already emailed EA Help about this but the customer service guy straight up ghosted me so here we are!!!!

I had a Windows laptop for several years and played the sims on that laptop. Over the years I accumulated 23 add-ons, 7 of which were purchased through the EA app, and the rest of which were purchased via Steam. 

I recently got a new Macbook Pro, and as an avid Sims lover went to download the Sims 4 onto that laptop. Through Steam, the Sims 4 is not compatible with macOS for some reason, so I had to download it through the EA app. However, when I download the game from the EA app, it will only let me download the add-ons that I purchased through the EA app. All of the other add-ons I had purchased through Steam were showing up as only compatible with a Windows operating system. The thing is though, the EA app still recognizes that I own these add-ons, it just won't let me download them. So if I did happen to have the funds to just rebuy everything (which I don't) it won't let me do that either. 

If anyone could help me figure this out, I would really appreciate it since the EA customer service guy will not respond...