List available Node.js versions available.

dnf module list nodejs

AlmaLinux 8 - AppStream
Name           Stream           Profiles                                     Summary
nodejs         10 [d][x]        common [d], development, minimal, s2i        Javascript runtime
nodejs         12 [x]           common [d], development, minimal, s2i        Javascript runtime
nodejs         14 [x]           common [d], development, minimal, s2i        Javascript runtime
nodejs         16 [x]           common [d], development, minimal, s2i        Javascript runtime
nodejs         18 [x]           common [d], development, minimal, s2i        Javascript runtime
nodejs         20 [x]           common [d], development, minimal, s2i        Javascript runtime

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled

As we can see above, nodejs 18 is disabled. Enable it with

sudo dnf module enable nodejs:18

Now we can install with

sudo dnf install nodejs

You may need to uninstall older versions.