Usually, we just can't access because our internet provider blocks gambling sites due the law and regulation. My ISP provider blocked some few site like (Stake, Chips, and other), using custom DNS on the browser setting will fixed the ISP blocked.
Yes. If it’s your Internet Service Provider which blocks the access to the casino then there is no need to use a VPN or even a DNS third-party tool to bypass the restriction. All you need to do is to change the DNS servers which were automatically assigned by your ISP to a different one like 8.8.8.8. You can do that from your device's
Network and Internet settings.