Custom Attributes and Shipping Method

I’m very new to Magento. I installed version 2.4.6.

And I’m trying to make a shipping method to estimate the cost of shipping.

I created three new products’ attributes (height, width, and length), plus the weight that comes by default.

And I need to calculate the shipping cost with a formula based on those four values.

But I only get the weight in the method collectRates() using $request->getPackageWeight()

Is there a way to get all the other custom attributes?

Thanks