Mobile traffic to Clickbank offers?

It's going to depend on the offer. Many CB salespages are not mobile optimized.

I wouldn't send mobile traffic to one of those video sales letters with a long video of indeterminate length with no controls, no or little text, and delayed order button. People aren't going to put up with that on a phone.

Also the salespages that are made up of large graphics instead of text and are not made for mobile viewing are going to look very unprofessional and are going to be hard to read on mobile, as well as slow-loading.

You really have to find the right offer and salespage if you want to advertise on mobile or you need to work with the vendor to send directly to the purchase page and bypass the salespage. And then of course it has to be something the customer would be willing to put in their payment details for on mobile, which people are less likely to do than on desktop.

With my paid traffic, I only pay for desktop traffic to CB offers. If it's free traffic, then try to pick offers based at least partly on mobile compatibility.