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Isn't getting a static IP address a problem?

A dynamic IP + DDNS is fine for 95% of use cases.

The bigger issue is if your ISP puts you behind a CGNAT in which case you’ll need a product like cloudflare tunnels or you can roll your own with a vpn tunnel and a vps with a static IP.

Some ISPs provide static IPs for an additional fee. Also, there are services like Cloudflare[1] and NoIP[2] that provide Dynamic DNS (DDNS) so you can tie your dynamic IP to a static address.

[1]: https://developers.cloudflare.com/api/operations/dns-records...

[2]: https://www.noip.com

Cloudflare Tunnel is another increasingly popular solution (proxying all your traffic via cloudflare, with the CF Tunnel client taking care of establishing the backend<->cloudflare connection)

Of course you can do a similar thing yourself by getting a cheap VPS somewhere (~$2/month with no-name hosters from lowendbox.com) and connecting your server to it via wireguard

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