Web Api is stop working for some iphone devices

I am using web api in my angular application when ever i try to open my website on iphone only angular content works not all the api content but when i try in android mobile both work

I couldn’t find the solution for that , could anyone please help me in this case

Brief :- I am using some worker service from cloudflare when i open the log in the worker service i got this error
"outcome": "canceled"