fpaste --someinfo --printonly. See fpaste --help for the options. You can send it to your screen with that command or you could do fpaste --sysinfo --printonly > sysinfo.txt to send it to a file. Or your command inxi -b | fpaste --printonly > inxi.txt for instance.
As for sending the output via terminal, there are a few different programs that might work, but I’ve not used them. You can search for it dnf search pastebin. Or you might be able to adapt fpaste (which is a shell script, not too complicated) to send to another site’s API.
Apple, Microsoft, and Google all have “free” file storage for the users and ways to permit access to particular documents by other users, but access is either public or restricted to
other users of the same platform. Forever is a ling time. Google will allow you to say who
has access to your account when you become “unavailable”.
Community networks (I use chebucto,ns.ca) have free accounts and may give users a small space where they can make files publicly available to https clients. You can encrypt files so only users to whom you have provided keys can see the contents.