If you are not satisfied with severity set by triager, do speak to them and explain in detail why severity should be increased!
vulnerability was XSS to account takeover.
Here I explained in detailed to them.
See result: -
#bugbountytips
@bug_vs_me
I need some tip while picking up the target ,I don't why while bug hunt i always stumble upon sites that has very very strong protection like cloudflare and stackpath🥹