Get this gopro mount for the lyzene

https://www.amazon.com/LEZYNE-LED-Mount-Adapter-Black/dp/B07586GN12

Get the gopro to garmin mount

https://www.amazon.com/KOM-Cycling-Mount-GoPro-Black/dp/B084Y1N9ZC

Get the garmin mount

https://www.amazon.com/Cestbon-Compatible-Garmin-Elemnt-Hammerhead/dp/B0BJZ7KWN9

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You can skip the gopro to garmin mount but that gives you the ability to quickly remove the light with a single twist vs having to unscrew the gopro bolt. If you're ok with the gopro mount itself, there's a lot more gopro mounting options for the handlebar.