Sadly not I'm afraid, I'm fairly sure this is a pixel exclusive feature that Google doesnt want Samsung to have but if you do find a way let me know because I miss this too aha.
I've been searching the net and it's rumoured to be in OneUI 3.1. But still not in power button options and instead in notification area under devices. I've got a lot setup linked to Google Home and have heard you can link to smarthings but not found way to do it and not interested in using Bixby
The update is out in UK, includes February Security updates as well as OneUI 3.1. Google Home control is now listed under devices when you pull down the notification section