If you own Reaper, the included ReaComp can mimic gain riding.
A smooth, program-dependent compressor designed for mix-ready leveling on vocals and bass without sounding obvious. (Free, no account or credit card required) Download Vocal Rider Plugin Free
What you are currently using (Ableton, FL Studio, Logic, etc.)? Whether you operate on Windows or macOS ? If you own Reaper, the included ReaComp can