Because I was afraid that my resume would be too expensive, I merged the three companies into 1 company, and it was the second company. HR background check, can it be recovered?

Personally, I think your estimate is not easy to recover. The recruiter will think that you have not violated the principle of good faith, which is the most taboo for employers to recruit. Please correct and fill in the real experience when you do your resume in the future, but you can polish it properly without distortion and dishonesty.

The above answers are for reference only. Good luck with your work!