My black australorp (from Cackle Hatchery) hatched on April 6th, 2022, and she did not start laying until 26 weeks on the dot, very early September. She looked ready to go for a month+ before finally laying, too.
Once she started, though, she hasn't stopped at all and laid right on through the winter. She lays 5 to 6 eggs a week consistently and they are either large or extra large eggs. Beautiful, consistent layer, super sweet, loves to run right up to me for scritches and treats. The eggs will come. Give them another few weeks.