Simic Hybrid race has this option at 5th level:
"Grappling Appendages - You have two special appendages growing alongside your arms. Choose whether they’re both claws or tentacles. As an action, you can use one of them to try to grapple a creature. Each one is also a natural weapon, which you can use to make an unarmed strike. If you hit with it, the target takes bludgeoning damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike. Immediately after hitting, you can try to grapple the target as a bonus action. These appendages can’t precis…