Step 1: Does the Android app scheme opens the app when it is installed on the device?
yap_pakistan://

Step 2: Does the iOS app scheme opens the app when it is installed on the device?
yap_referral://

Step 3: Check if appscheme+path does the redirection on Android?
yap_pakistan://customer_id=123&time=2021-09-22T12:39:35

Step 4: Check if your raw universal link + path does the redirection on iOS?
https://lwnq.adj.st?customer_id=10000071&time=2021-09-14T13:43:22