What are in the cabinet because if it is for a kitchen I would put up hooks like these below from Amazon

Ask your landlord to fill in the planter hole with a board painted to match the existing wood. Or buy a sack of Mexican beach pebbles (about 2" in diameter) and fill it up.

Since live plants are pretty popular again, I'd get a few real ones, leave them in the pots and put them in the planter box. I think a variety of succulents would look good, and fill in the blank spots with the beach pebbles, as above. I don't mind the bamboo rods, which is good, because I have no thrilling idea for what to do with them!

What’s in the open space on the right angle side with the upper cabs? It looks open but can’t tell if it is or if open all the way through. What do you use the storage space for & is this a formal dining room or open to other spaces? The hanging light looks formal & can see it’s open to another room - LR?

it’s not open. it’s a piece of glass. the storage space is for dishes. it’s open to the living room

Ok thanks for info. That gives me a better visual. I would fill it with nice quality fake plants. Not a whole bunch of foliage & garland stuff but plants in pots. The depth / width doesn’t look like much so smaller pots.. If you want real plants then I’d go for a collection of Sansevieria - varied heights & leaf colors & patterns. Matching pots black or white. These are low light tolerant & low water needs. Here’s a Wayfair link to some of the fake ones for what they look like

Snake plant or Sansevieria

Ask the landlord if you can remove the bamboo rods. Place a piece of stone, glass or wood on top.