if appeui, deveui and appkey are correct, you should see an “activation message” in your application console -> data, shortly after the join request in gateway traffic.
If you do not see anything in application console, you most probably configured appkeys in wrong format.
from the “activation message” you should then see which gateways received the join request. If you only see your gateway there, the corresponding “Join Accept” in gateway traffic should follow.
In case multiple gateways are in reach, you might miss the “Join Accept” in gateway log, as it might be sent via a different gateway.