Across the board the overall bot numbers are probably over 20% easily, and while 20% might not seem massive, those 20% are probably used in a focused manner for maximum impact.

For example, for politically charged topics like abortion, it wouldn't surprise me if the bot influence is over 90% simply because that's where the largest portion of the 20% are focused. Topics that are important to the Left and to their establishment allies probably get special attention, e.g. the Rings of Power release, Ukraine-related news stories or the latest "exploitable" mass shooting.

20% can have a massively oversized impact if used effectively.