I'm a realist, it is not always a strict flow but I try to "surf" every day to follow it.
Understand problem
Find competitors
Research solutions
Contents
Budget and Deadlines
Ideate
Sharpening problem
Find creative solution
Sketching
Design system strategy
Components library
Prototype flow
Test
Repeat
Find tecnical solution
Develop frontend skeleton
Implement
Optimize
Test
Launch & Evaluate