All of your products should be available for purchase from your own website. If there has to be a small delay between listing them elsewhere and offering for sale yourself, then indicate the expected availability on your site.
It also needs to be much clearer which ones are available and which aren’t. Right now, I can’t tell until going into the actual product listing - the prices shown at the higher search level are not an indication that it can be purchased here. It looks like having a star rating here might be an indication, but not sure if that is always true, and it isn’t super obvious to anyone new.