To optimize muscle hypertrophy you should apply progressive overload.
How? Do more each week! Important to track your trainings and you can do via App adding the reps and load and sets.
Progressive overload is not only increasing load each week.
It can be: better form, more ROM (range of motion), movement feels easier and faster, more sets, more reps, more weight (load), etc..
Keeping track of all you training is key and keep pushing yourself hard each week doing more over time.
Sets needs to go close to failure, means leaving 1-3 reps left in the tank. True to Failure is very taxing to the body. Failure means not able to do any more reps or when you start to break your form.