If by your use of the word "Recommendation" you mean feedback on other members contributions, the system prior to the current version had the "Endorsements" feature. It was discontinued with the latest roll out. Those of us who have "Endorsements" of record on our profile were on the earlier version some years ago. If that is indeed what you are referring to I suggest you contact customer support at the link near the bottom of this page with your request for returning this feature to the platform. Many others have done so recently.
Other forms of feedback involve reporting spam and abusive content with features permitting those inputs at the question and profile level of an offender.
Over the last decade I have found customer support at MicroMentor very responsive to communications of the type to which you refer. I suggest you feel free to state your remarks, concerns and requests freely in emails to their management and staff.
Report Kenneth's answer
Hi Key. Today you have some communication options : a) use https://www.micromentor.org/mentors, click your mentor's profile and then "connect", and b) email your comments to email@example.com
Report Miguel 's answer
Hi Miguel and Kenneth, Thank you for taking the time to provide me with this information greatly appreciated.