Hi, welcome.
I've never found sowing annuals direct very successful, heaven knows what gets them but something does, so I start off in modules and plant out. This year I sowed cosmos, linaria, godetia, flax, and although they germinated they are growing so slowly in this cold weather. Nowhere near big enough to plant out yet. Stuff that reliably self-seeds in my veg plot, californian poppy, marigold, poached aggs, they are only just reluctantly coming through as well.
What I'm saying is, it's not just you! I'd pop a few in modules to bring them on, what have you got to lose? We might get a long hot Autumn!