don't know if it's a canna or not-
my guess would be not.

Here's a photo of my canna indica:
Your plant may be in full flower by now, & you can compare.

I think all canna leaves emerge all along the stalk, & they have short bloomstalks.

Your photo looks like the leaves all emerge near the bottom, & there's a long bloom stalk.

Also, your leaves seem longer than canna leaves.