This pattern is only available as part of the Beginner Granny Square Collection eBook and as tutorials on the Meema Makes YouTube channel.

Right handed: https://youtu.be/JEWM46PBnKg?si=WT5TABk6xT09rWBC
Left handed: https://youtu.be/y9bRhoh-RHs?si=7_5uUSv8iTdtbi_E