The fenix 8 is using the SYN4778 for GNSS (confirmed in F Tipi teardown), so I'm wondering whether the vivoactive 6 is perhaps using the single-band SYN47762.
Can someone please confirm the system + GPS software version numbers in their vivoactive 6? I'd also like to see these version numbers for the vivoactive 5.
If the GPS software version number for the vivoactive 6 is lower, it might suggest a move away from the single-band Airoha AG3335MN.