The former way of deep linking into the Alexa app doesn't seem to work like it used to. Further, the related posts seem to indicate screenshots of a share functionality that doesn't appear anymore.
I've got a URL that used to open into the Alexa Skill Store but no longer does: https://skills-store.amazon.com/deeplink/dp/B07XYVH481?deviceType=app&share&refSuffix=ss_email
I've also seen that you can use an Alexa-scheme to open in the Alexa app but I haven't been able to get that to work either.
Can you provide some new updated information as to how to deep link into the Alexa app? Our app provides a link to users so that they can go into the Alexa app and enable a skill/perform account linking. Keep the user in the browser is not ideal in this situation.