Yup!  Here's a help article that talks more about it and how to do it:

https://help.klaviyo.com/hc/en-us/articles/115005082787-How-to-Use-Product-Feeds-and-Recommendations

Curious, why make it random vs showing what may be relevant or targeted? Ie. Best Sellers, new arrivals, gender specific, etc..

The welcome email is one of the highest opened email, it's prime real estate!

Thank you so much! And yes, I’ll do that. 

Great response as always @Mailbox Manny ! Glad you could link our documentation and it’s always nice to see Community members helping each other and thriving together here :)