You could look at a SaaS offering such as IRCCloud https://www.irccloud.com https://www.irccloud.com I haven't done this but in theory you could use something

You could look at a SaaS offering such as IRCCloud https://www.irccloud.com https://www.irccloud.com I haven't done this but in theory you could use something like AWS Fargate or fly.io to launch a bouncer/irc client. Really anywhere that lets you run a free container should work, if you can secure access to it. This could be a starting point https://github.com/taylorworthing/docker-irssi https://github.com/taylorworthing/docker-irssi