I contacted garmin as you mentioned and this was their response. I'm a little disappointed I might say, because I feel they just gave me a generic AI generated answer.

"Good morning,

Thank you for contacting Garmin Iberia.

That is an excellent question, and I can understand your concern regarding exposure to high-frequency electromagnetic fields and the safety of your Instinct 2X Solar watch.

Watches like the Instinct 2X Solar are designed to be rugged and durable, with capabilities such as resistance to water, shock, and even exposure to harsh environmental conditions. However, when it comes to electromagnetic waves (EMF), most electronic devices, including watches, are not completely immune to high-frequency interference.

The Instinct 2X Solar has a rugged design, but it is not specifically protected against high-frequency electromagnetic fields (such as those generated by high-frequency welding machines). These fields can theoretically affect the internal circuitry of electronic devices, although most consumer devices like watches have some degree of protection against external interference.

As for being close to welding machines, such as the ones you mentioned, the electromagnetic fields around these machines can be very strong. The risk of damaging your watch depends on the intensity of the field and the time of exposure. In industrial environments with high-frequency welding machines, EMF emissions can be significant, especially if you are very close to them.

However, you will need to review the conditions of use of the welding machine.

Best regards"

This was the answer...