Thanks for your help I thought i’d point a couple of extras from when we were getting ours setup we were following this but also found a couple of extra paths that should be useful
Ideally, all paths under your domain should proxy to HubSpot. If that's not the case, then the following paths must proxy so assets load properly from your domain: /_hcms/*, /hs/*, /hubfs/*, /hs-fs/*, /cs/c/*, and /e3t/*.
/events/public/* - This is for redirects in emails to work correctly
/___context___/* - This allows devs to use the developer info page