Recent versions of chrome (which Wappler design uses) have started blocking cookies where the domain is not the same. In a mobile app, the domain will not match.
If the cookie in question is the security provider from your server action, then this should help…set the cookie to Secure and SameSite None:
If the cookie is your PHPSESSID cookie, then adding these to your php.ini should fix:
session.cookie_samesite = "None"
session.cookie_secure = 1
–Ken