Negative, Canon does not make battery grip for the T7i, which is one of my pet peeves against it. The camera is not designed to use a battery grip, either. So, any third party grips that you might see out there should be avoided.
Vello's is the BG-C15-2. B&H carries it in stock. It also fits the EOS 77D. A lot lower cost than a Canon-brand grip would be.
Vello is a good company. I have used their grips. Grips are simple devices....switches and a battery holder. If they say it works, I'd presume it does.
The odd thing is it uses a cable to connect the shutter release, rather than there being internal contacts to mate grip to camera inside the battery compartment. No big deal though.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM