parts of custom block models don't render when useing rtx

for some reason, the blocks with custom models that are apart of my addon parts or even the full block don't render and i have no idea why, here's a link to my google drive since I couldn't upload the addon, https://drive.google.com/file/d/1FqUSNpxL9MoWSr6RNRfbltiJlvWQzLw7/view?usp=share_link