During [b]Heresy[/b] the ability to switch between the two functions for [b]Barrow Dyad[/b] ([b]Resolution[/b] and [b]Ambition[/b]) was tied to interacting with the Seasonal Vendor object in Eris’s apartment. With the apartment and Vendor gone, you will now have to travel to the [b]Relic[/b] in the [b]Enclave[/b] and Reshape the weapon to switch between these functions; unlike other Reshaping choices, there is luckily zero material cost in swapping one out for the other. Alternatively you could just Craft two separate copies of the weapon with a different function and paired Catalyst installed to each one ([b]Resolution[/b] pairs well with [b]One for All[/b] while [b]Ambition[/b] and [b]Target Lock[/b] are a good fit) and pull them from the Vault as needed. (΄◉◞౪◟◉｀)