Connecting one FB ad account to 2 different Hubspot accounts
Hi @KStrydom! It appears that all users with Marketing Hub Professional or Enterprise can connect multiple Facebook Ads and Google Ads accounts to HubSpot. Google Ads accounts must be connected by the same user. You should be able to connect an additional Google Ads account by navigating to your HubSpot Settings (gear icon) -> Marketing -> Ads, and then click 'Connect account' and follow the authorization steps.
I hope this was helpful. Please report back to let me know if it worked for you!