Details below may help. Seems like Global Mode may be a key, and j_hansen has a good point. My understanding is that Verizon phones are unlocked, but would be good to get Verizon to verify per your particular situation. Also, you may get more responses on your XDA post.
https://forums.androidcentral.com/sa...atibility.html
I had a similar question about using a Verizon Note 8 in the UK. My wife has one and we are planning a visit to UK later this summer. Don't want to have any surprises with her phone not working fully with LTE on 3, or only getting 3G.
https://forums.androidcentral.com/sa...-8-uk-sim.html
As a last resort, you could consider getting a Vodafone Note 8, and then when in USA use the Verizon one. Or get a US unlocked Note 8, and sell your Verizon Note 8 if your work may not provide an option for a Vodafone or model that has the bands needed for Vodafone and other non-Verizon (no CDMA) global networks. Appreciate that may be cost prohibitive, but if your business is providing an allowance for work mobile, then may be feasible.
https://www.vodafone.es/tienda/parti...ecio=948398690 https://forums.androidcentral.com/e?...token=7YFdX4vT