Indeed, it's permissible, but don't expect cannabis corporations to freely provide anything, inclusive of information regarding their stock.
In the era of medicinal cannabis, when cultivators took pride in their cultivation, they would gladly allow you to try their latest variety.
In the current times, your most viable option is to sample the products of various cultivators and remain loyal to the one or two, from a pool of around 100, that genuinely stand out in terms of quality.
I discovered one such cultivator that consistently delivers high-quality products, though their goods always cost over $150 per ounce, and approximately $40 for an eighth.