Probably getting enough support from the house itself. Luckily there isn't a lot of weight with the cover, Regardless, I don't blame you, you want to be safe. I can see your concern.
For safety, support it with a couple solid 2/12's from ground. Get 2 bottle jacks, jack/level it up. Remove old all rotted wood install new wood. Also looks like you got some rotted roof joists as well. You can get 8X8 or 10X10 supports then decorate them back up. if you got the time and $$.
Or you can just cover it back up like it was and paint it. It's a 100 year old bugalow and it hasn't fallen down yet. Up to you. Just my opinion and thoughts.
For safety, support it with a couple solid 2/12's from ground. Get 2 bottle jacks, jack/level it up. Remove old all rotted wood install new wood. Also looks like you got some rotted roof joists as well. You can get 8X8 or 10X10 supports then decorate them back up. if you got the time and $$.
Or you can just cover it back up like it was and paint it. It's a 100 year old bugalow and it hasn't fallen down yet. Up to you. Just my opinion and thoughts.