Melissa, I am doing the same thing with my September 2023 seedlings, waiting for warmer weather before transplanting. Of course they are not anywhere the size yours must be now. Mine are still just tiny seedlings. As tiny as they are, some are starting to show color. I think we are both looking forward to the time when we can give each seedling it's own space.
I need to plant some of my 2023 seeds. Not sure which ones yet.