[Arnavion]

>I don't know of any ISP that will give you a public ipv4 address for free.

There probably isn't an ISP that gives out *static* public IPv4 addresses for free, but any ISP that supports IPv4 without CGNAT will give out public IPv4 addresses by definition. The two I've used in the US (Frontier, now Ziply) certainly do.

[cassianoleal]

Aquiss [0] in the UK gives static public IPv4 and static /56 IPv6 PD included in the regular plan price.

[0] https://aquiss.net/