"Spellforce 3: Soul Harvest" game bought on Epic is not visible in GOG. GOG updated, Epic account connected, other games are visible. I've got 333 enties in Epic launcher (but some are mod kits, don't know if it's propagated to GOG), 314 in GOG.

Have you tried clicking the cog wheel in the top left corner, then choosing Sync Integrations?

If you haven't already done so, open a new support ticket. It can take weeks to get a response, so best not to delay.

Yes, synced many times. Game is not visible.