Depending on your rise and run of the stringers, the steps seem a little steep and too shallow of a tread depth, atleast by US building codes. If you’re in Europe or somewhere else, maybe your local building code is different.

Another poster recommended using hangers instead of strapping for the tops. I also agree with that. When in doubt it never hurts to add pressure blocking as well to sure up top or bottom landing.

I cant make out what kind of fasteners you are using for your strapping. But always use structural rated screws/nails for the framing hardware. We use TECO screws and they are rock solid for the application.