Another option being as I got mine cheap is the Rod Hutchinson Hybrid Cabrio Brolly System.
I have used it for 4 sessions now, in two formats.
The first overnighter session, boiling hot after lockdown, I just set it up with storm sticks and used it as shade from the sun.
The next sessions as I was fishing for a few nights I added the porch extension to increase storage space inside.
The brolly itself comes with stormsides as standard, a clip in groundsheet and a proper zip in door, which I haven't used yet, preferring the open front.
In the brolly alone I can get my bedchair with a Korum ruck bag behind that holds my food, rucksack by the foot of the bed, tackle box by my bed head.
The only reason I changed is I simply fancied a new bivvy, not because I had to.