It has it. I own an S21 Plus and a Galaxy Tab S7. This afternoon the tablet upgraded the Android UI to 3.1. After that all messaging apps stopped working on the tablet. Verizon Messages won't even launch. Samsung Messages runs and goes through the steps to synch with the phone. But it doesn't work and it won't send SMS messages.
Give this link a try for more information on call and text on another device: https://www.samsung.com/us/support/answer/ANS00083152/
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.
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I have setup call and text on other devices, the texting works, but it says call not sent every time. I have factory reset and contacted my carrier.
I've turned off the call feature, calls were delayed from ringing on phone then tablet s7 would ring and show caller ID minutes to hours later. I suggest doing same and just have it on for messages.