So the Apple user guide for watchOS 11 lists the available models. If you were unsure about which gen SE you had, you would have to check their identify page. Links below.
From what you posted, you have a the first gen SE which doesn’t get watchOS 11.
I wish they had a comparison chart but I can’t find it if they do.
https://support.apple.com/en-ca/guide/watch/apd2054d0d5b/watchos