Following my recent engagement with AMD and GPU rendering (or lack of) when using Vegas Pro 19 alongside AMD Vega Frontier GPU here is the optional driver available from AMD website -- https://www.amd.com/en/support/kb/release-notes/rn-rad-win-22-8-2
I am using https://www.amd.com/en/support/professional-graphics/radeon-pro/radeon-pro-series/radeon-vega-frontier-edition-air-cooled and will be updating this post following driver update to feedback to Vegas users of any other issues I encounter.
Bye for now.