Google Voice user for 15 years and I've had about 3 instances where my number wasn't usable for 2FA, mostly because, to your point, by the time companies that care about security learned about voip #s they realized they are mostly used legitimately and sms was insecure anyway. Luckily I found a great FOSS auth app, which I prefer to sms anyway; especially if traveling I don't have to depend on a mobile connection to be able to complete 2FA.