Just wait upto 45 days, 99.99% chance you will get all your pending transaction rewards/welcome rewards.
If you do another transaction then high chance your 2nd transaction credit the welcome rewards.
Note- you can also complaint to customer care after 30 days, they will manually credit or wait upto 45days choice is yours.
Some people also get welcome reward twice on same firstap card, 1st time through manually after complaint and 2nd time within 45days, automatically credited again welcome rewards.🤣🤣