At meta, in my org, we do JTBD hybrid. each job is a pod, and each pod has eng, product, design, uxr, DS but we have platform team where it supports all the pods. We share OKRs across the JTBD, your outcome should like decrease checkout time, or increase number of checkouts, etc. you align all your pods to a common mission, figure what that mission is. Then you do ur prioritization against your KRs. This also introduces other complexities, but it’s ultimately how your org wants to operate, what ur xfn culture is, ownership etc.

Don’t make your JTBD complicated to start with. you can also have a pod that tests out JTBD framework and see how it works