Thanks! Room is 15’9”x16’18” Walls on either side of fireplace are 69 inches. Small walls opposite fireplace (including the one with the door to the deck) are 45 inches. Any suggestions for dimensions and placement of end tables or sofa table?

Your title says "bi level". Is there a change in floor level behind the sofa? You obviously have two separate areas to decorate, so maybe that is what you meant. I can give you my opinions, but you really should make a floor plan for these areas. Start in one corner and measure the length of a wall. Note how far a door is from that corner. Write down these measurements, with notations, such as Point A to B = east wall = 16' 3" and east wall closet door 8' 5" from point A. When you have measured all the walls and doors draw the walls on 1/4-inch graph paper (aka quadrille paper) which you can print from HERE. Your room is larger than an 8.5 x 11 page will hold, so print out more pages, then trim one edge and tape two or more pages together. Draw the floorplan so that 1 foot equals 4 squares on the paper. Each square will represent 3". Door placement doesn't have to be exact, but note which way the door swings, so it isn't blocked by furniture. Next, measure whatever furniture you intend to keep. How long and how deep is the piece? Most sofas are around 7' long by 3' deep, but there are variations. Take a tape measure with you when shopping. Furniture always looks small in an expansive showrooms. Make sure it will fit before you buy. After you have measured the furniture draw the outlines of each piece on another page of graph paper to the same 1' equals 4 sqares. Label each and cut it out. Now you can move the furniture about on the floorplan until you find the best position. Make sure you will have room to walk around the furniture. Try for a 42" pathway. I'm thinking you should leave a path on the left side of the TV area so it's easy to get to the bathroom from the fireplace area. I personally do not like sectionals, preferring a single sofa with 2 or more chairs that can be angled toward the TV or towards people for conversation. If, however, this room will primarily be for TV viewing a sectional could be better. Here is a Houzz ARTICLE on sectionals. The fireplace area is small and should be made cozy, IMO. A couple of chairs with ottoman and a table between. Perhaps a loveseat or divan under the windows. Maybe you like sitting in front of the fire, so how you place the furniture depends on how you will use the space. Once again, use the floor plan to see how furniture fits.

I would put TV on the short wall by the FP so both could be enjoyed as a focal point. The TV gear can be stashed in the closet behind it. Float a 3-seat sofa perpendicular to the balcony sliders with two swivel chairs opposite it; all of them around a coffee table. Place a drop leaf dining table against the "south" wall. Only one leaf needs to be up for the two of your, and it can be pulled away from the wall and opened for guests. If you only entertain a few times a year, consider renting extra chairs for those occasions. If you do dinner parties more frequently, two chairs can slip under the two ends of the table and two could flank it on either end. A third pair could go in the second bedroom until needed. Mixing and matching chairs can be interesting, and pulling them from other rooms works too.

Thanks @Beverly - this is meant to be a 'light' and neutral room. Sort of - I struggle with that because I like color and the neutral gets boring to me. I thought gray/tan would work together - I actually just bought that rug which is supposed to have the grays and browns pulled together lol. I should have pitched my idea here before buying. Thats def interesting with a more square art above the fireplace! I will have to play with that. @Patricia Colwell - thanks for making me draw the scale diagram. Def a useful exercise! Here is an image of the measurements and the logic behind my bench/daybed. Its one of my fav spots to sit and read as its south facing and looks out into my backyard.