Samsung uses wearos from now on so try picking wearos instead of Samsung. Since it seems app is out of date when it comes to how to connect Samsung watch, since it goes to old Samsung watches and dev needs to update it to support newer ones.
Old watches uses Tizen OS that is discontinued by Samsung so instead they have WearOS by Google that is partly modified to support Samsung apps based on Tizen and at same time it has WearOS app support.
Also last pic is not samsung connect. It seems samsung connect is part of smartthings.