I'm having trouble saving pictures ATM (will add more if I can) but I think the square table would work if you add some height with cushions. The top of the table is nearly the height of the bench which makes it look off imo so would add some cushions along the back to get add height (plus your seat pad).. I'd also pull it away from the bench. Down the other end of the bench you could add a footstool just for a relaxing area. Or opt for a rectangular table if you purely want dining.

this was the photo with a footstool and I can't photoshop but I think adding cushions like this makes a huge difference?

If you look at the photos in the 'garden and outdoor' section and order the photos by 'all time popular' it comes up with the photo below. How about having a fire pit with a wood top that could be used as a table. It's obviously a clear favourite for many people.

Fire Pit · 詳細

I think that first of all you need to answer the question of how you will sit at the table - on chairs (and then you will need to buy them) or on soft poufs (and then it will be a low table). How many people will there be at the table? I prefer the rectangular table 78 * 200. But this is just your preference. Maybe you want to make a rest area in oriental style (carpet and pillows).

Take a closer look at the new outdoor collections. Maybe this will push you to new ideas.

I think a very long dining table with a bench seat opposite would work well in the space. Cushions will liven it up a bit and make it more comfortable. Two or three large planters will help make the space feel more balanced and less empty.

Think of the space as a room. You’re currently looking at the room in an empty state apart from a table. Start to zone and dress that room. You’ve had some great suggestions already. Add the cushions, keep the table (cut down the legs if you need to make a comfortable dining height), add chairs to the other two sides. As suggested, a fire pit might look good. An outdoor rug might help with the zoning. Add your planters to add character and get some taller planting in behind the seating to soften the area. Your options are endless. Photo of an alternative option attached. It could look great, just get zoning!

Great post above, hit the nail on the head, it’s more or less an open plan room outdoors and the exact same rules apply to make it look good

I think you need separate stand alone seating as above to fill the space

I’ve the same issue, I’m going to end up with two three seaters, a coffee table, a dining table for 6, two lounge chairs and a large wood burner to fill the space!