Standard IPv4 NAT or CGNAT?
Are you using their modem AND router? Or just their modem? If it’s a modem router combo, can you place it in bridge/passthrough mode?
Even if it’s CGNAT and no bridge mode, their are solutions available.
Are you looking to host private services like NextCloud? Or public services like a website?
After unceremoniously shitting all over the Netflix Marvel shows, Disney+ is doing an about-face and literally rebooting some of them WITH the original creators i.e. Punisher Season 3, it’s happening.