These erasers have worked wonders on most surfaces for me (wood included).

Since you’re painting directly on wood maybe try adding some mixed medias (like sheets of acrylic plastic) to help it pop a bit more.

Pentel Hi-Polymer Block Eraser, Large, White, Pack of 10 ZEH-10 Erasers (ZEH10PC10) https://www.amazon.com/dp/B07144DC8V/ref=cm_sw_r_cp_api_i_JYF75GKFEKT0PK8WJF6W?_encoding=UTF8&psc=1