Hi Rui,
Yes, it is possible to establish deep feelings for someone just by talking on the phone.
It happens quite often. If the conversation is good and consistent, it tends to establish a bond between both parties.
The fact that the both of you matched twice on the dating app isn’t necessarily a sign that the both of you are supposed to meet each other.
People get matched up on dating apps with the same person quite often.
It is typically based on the dating app’s matchmaking algorithm.
If it was able to match the both of you once, it can do it again and so on.
So, try not to read too much into the fact that the dating app has matched you both up twice.