Short answer: No—makhana (fox nuts/lotus seeds) is generally not abhakshya for Jain householders.

Explanation, keeping Jain rules in mind:

• Abhakshya typically includes things like root/tuber vegetables (mool-kand), honey, meat, alcohol, and strongly fermented items. Makhana is a seed, not a root or stem.
• Therefore, for Shravaks/Shravikas in both Shvetambar and Digambar traditions, makhana is ordinarily bhakshya (permissible).
• During specific vows or stricter observances (e.g., paushadh, aayambil, certain fasts), individuals may choose additional self-restraints. In such cases, follow your vow’s specific guidelines and your guru’s instructions.
• Monastics follow far stricter rules (alms-only, fresh, non-stored, etc.), so packaged/processed makhana would not be applicable to them.

Practical care:

• Prefer clean, fresh, well-sifted makhana to avoid inadvertent harm to minute beings.
• Avoid preparations involving fermentation, live cultures, or additives you already refrain from.