Every product vendor, especially those that are even within a shouting distance from security, has a wet dream: to have their product explicitly named in corporate policies.
Does SOC2 itself require that or just yours? I'm not too familiar with SOC2 but I know ISO 27001 quite well, and there's no PR specific "requirements" to speak of. But it is something that could be included in your secure development policy.
And it's pretty common to write in the policy, because its pretty much a gimme, and lets you avoid writing a whole bunch of other equivalent quality measures in the policy.