Hi Shawn, welcome to the forum!
I’ve used Sonlight science through third grade and hardly any of the materials are from a YEC or ID perspective, most of them are from secular education publishers. The IGs specifically talk about three Christian perspectives (YEC, OEC, TE/EC) and say it’s the parents’ job to communicate their preferred view.
Since TE/EC accepts mainstream scientific consensus, there isn’t really that much need to have special science materials written from their perspective. The science is the same as “regular” science. The areas of discussion come up when you are studying the Bible and theology, and most of us don’t bring up those specific science/faith issues until kids are older. There are plenty of nice elementary level science resources, so you wouldn’t need to reinvent the wheel there. What there is probably a market for is Bible study materials/devotionals for elementary kids that deal with Genesis in a science-friendly (or at least science neutral) way, since many of the homeschool materials that talk about Genesis presume a YEC science understanding. For example, if there were pretty books that brought down some of the ANE context stuff you find in commentaries to an elementary level, I would buy that.
A lot of OECs reject common descent, so maybe they have their own materials when it comes to teaching about evolution. Reasons to Believe has a recommended resources list for homeschoolers on their website, if you want OEC endorsed materials.