Looking for advice from real active POD sellers

I'm an Etsy seller and have been selling digital wall art on Etsy for 3+ years — over 4,000 sales and 400+ five-star reviews across my shop. Most of my bestsellers are laundry room and bathroom art, and I've built up a library of 850+ designs across 16 collections (not all laundry or bathroom!), all in 8 print sizes.

Honestly, I wanted to make a little more money on the side, so recently I packaged them into a commercial-use bundle for POD sellers — the idea being that someone starting out or scaling up doesn't have to spend months creating designs from scratch. Everything's pre-sized, commercial licence included, and I add new designs weekly.

I've set up a landing page and run some Facebook ads but honestly the conversion has been slower than I hoped. The advice I'd like to ask you all for is:

— Would something like this be useful to you, do you actually ever buy bundles like this?
— Where do you actually go when you're looking for commercial-use designs? What platforms do you use to find them?

I won't put the link in because I don't want to seem like I'm spamming or just pushing my product.

I'm genuinely trying to understand if I'm solving a real problem for people in this space or if I'm missing something about what POD sellers actually need, or where/how I should be marketing this. Or basically if it's worth me doing this at all (my Etsy shop is still going and as I said before, I'm creating new designs every week).

Any advice would be welcome.

Thanks