I have the same list of approved weeds...
I deliberately introduced purple toadflax a few years ago and hope to add Mallow as well. Collected poppy and Red Campion seeds earlier with the probably over optimistic idea of adding those as well.
Previous attempts at growing from seed have always sunk without trace, for which the finger of suspicion is pointed at slugs and snails. They seem to laugh at my ring of broken eggshells, and I don’t use pellets as I have frogs and birds.
I also have leafcutter bees, and wanted a closer source of nectar and pollen, hence the (failed) seed experiments.