GENKI: An Integrated Course in Elementary Japanese Vol. 2 - Workbook (3rd Edition)

GENKI Workbook Vol. 2 is the practice companion to GENKI Vol. 2 Textbook, following the same lesson sequence so you can reinforce what you've just learned. Exercises cover grammar, listening comprehension, and kanji writing and translation. Listening audio is available through the OTO Navi app. If you're self-studying, this is essential.

It's the most straightforward way to practise what you've learned in GENKI, and the closest thing to having a teacher guide your practice.
Nothing in the reviews suggests the Vol. 2 workbook experience is meaningfully different from Vol. 1. Keep it parallel?