orbi RBK50 not connecting to iPad pro

What version of iOS are you running? The most recent iOS (14.x) has a mode which "hides" the true MAC number from a router. This is designed to prevent open (non-secure) WiFi systems from allowing access to you iPad/iPhone. Be certain, when you're at home, this mode is turned off. Go to your iPad settings and select Settings>WiFi>Network Info>Private Address>Off. With this mode on (which is the default), some systems will not allow iPads or iPhones to consistenly connect to WiFi. https://support.apple.com/en-us/HT211227

Good Luck!