it Looks like you have put a lot of effort into building the raised bed border. If you find that plants don’t thrive there after all don’t be afraid to minamize to a few containers and only mulch that lays below the rim. A water feature could play nicely in there too.

i Would start by making a scale drawing of the area to see whats left once the seating and fireplace are installed Perhaps the raised bed can be utilized for counter or table space adjacent to seating area.

Consider a solid gate to create a storage area in the corner where you are storing the wheel barrel. Or planting a group of dense shrubs as a natural screen.

Once the hardscapes are drawn in, I don’t think there will be a lot of room leftover.

some ideas:

Dougs picture is great. I definitely like rounding the corner with a ground level planting bed. Perfect location for fountain or bird bath.