The HR department will not or should not revoke the offer solely based on a wrong entry made by the employer in the PF portal. However, every HR professional prefers to have their records accurate and matching with the PF portal. They can proceed with the joining process and later correct the name in the PF portal in due course. If the payroll rejects the entry at the time of contribution payment, they will be responsible. Therefore, the person onboarding the employee will ensure that the name matches the certificate and is reflected on government sites like PF/ESI, Income Tax, etc.
In order to avoid an unpleasant situation, you should personally visit the EPFO office and meet the officer in the technical/IT cell to resolve the issue. If the front office or PRO's office staff, who are the first point of contact for members and employers, are not cooperative (as they often are not), you need to request permission to meet the IT person. Explain that you have a very good offer, and failing to join would cause you irreparable loss, and manage the situation accordingly. Therefore, take it as your responsibility, even though your name was entered incorrectly by the employer.