Here's my understanding of proof sketch: transform problem via tangent half angle formula. Show zeros must be of two types, one of which directly shows real part of s = 1/2. The other gives a plane within the critical strip showing zeros off critical line. However such a plane is impossible, therefore s always on critical line. What holes can we poke? Is this transformation via tangent half angle legit? Has Tooker been defeated?

https://www.researchgate.net/publication/344037263_A_Direct_Proof_of_the_Riemann_Hypothesis