The Lanshan 2 is a darling if /r/Ultralight and would be a decent tent for one or two people. You can get the Mier version on Amazon for about $130. https://www.amazon.com/dp/B07F8S54NH/
Note: this tent sets up with Trekking Poles. If you don’t already use poles while backpacking, I recommend getting some. Your knees will love you.
The tent is heavy af. Is 5.6 pounds correct?The lanshan2 is currently $159 and it weighs half of your current tent. FYI the price fluctuates from 120 to 190 if you have time to wait for a deal.
If you use trekking poles and are ok with non-freestanding tents. I cannot recomend this tent enough.
MIER Ultralight Tent 3-Season Backpacking Tent for 1-Person or 2-Person Camping, Trekking, Kayaking, Climbing, Hiking, (exclude Trekking Pole) https://www.amazon.com/dp/B07F8S54NH/ref=cm_sw_r_cp_api_glt_i_MG4EDJ4T80BDK3511DZC
+1 for the lanshan. They’re also on amazon (yes, it’s the same tent. Mier is just a rebrand)
MIER Ultralight Tent 3-Season Backpacking Tent for 1-Person or 2-Person Camping, Trekking, Kayaking, Climbing, Hiking (Trekking Pole is NOT Included), White, 2-Person https://www.amazon.com/dp/B07F8S54NH/
For a UL ground sheet get some polycro and cut to size.
Duck Brand Indoor Extra Large Window/Patio Door Shrink Film Kit, 84-Inch x 120-Inch, 282450 https://www.amazon.com/dp/B000NHW2Z6/
If you are hiking with trekking poles then that opens yourself up to some cheaper and lighter options like tents from six moons designs. I have a Chinese knock off six moons designs haven tarp and it's perfect for an ultralight but large 1-2 person tents. It's called the Lanshen or the Mier depending on what website you order from, but I bought it directly from amazon with free 2 day shipping and it's less than 2 pounds and you can pitch it with just the tarp or just the net. here's the amazon link