CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-285066, 333-279429, 333-271268, 333-254511, 333-270541, and 333-271266 on Form S-1, Nos. 333-280176 and 333-290837 on Form S-3 and Nos. 333-290671 and 333-222313 on Form S-8 of our report dated September 25, 2026, relating to the financial statements of NioCorp Developments Ltd. appearing in this Annual Report on Form 10-K for the year ended June 30, 2026.

/s/ DELOITTE & TOUCHE LLP

Denver, Colorado

September 25, 2026