johnzaro

(I used hopper disassembler)

1) Open the Safari binary from iOS 13.7 [binary 1] and also open a Safari binary from iOS 14+ [binary 2] which has the selector you are interested in converted to direct method.

2) Search in the processes tab of the [binary 1] for the selector you are interested in.

3) Open it and have a look at the code inside it by using the 'pseudo-code mode'.

4) We now arrive to the 1st way to find a direct method: