HI I have a 2001 honda oddysey van and when the gear lever stays in park mode it does not go in reverse or drive does not move at all
Please advice what needs to be done

This link should help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-9.html#post1838065

If it requires stepping on the brake to move out of park, check for a short in a safety switch under the pedal? (just a guess)