Exhibit 32.1
CERTIFICATION PURSUANT TO RULE 13a-14(b) OF THE EXCHANGE ACT
AND 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report of ADVASA HOLDINGS, INC. (the “Company”) on Form 10-Q for the three months ended June 30, 2026, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company does hereby certify, pursuant to 18 U.S.C. Section 1350, as enacted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| (1) | The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and | |
| (2) | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
| August 12, 2026 | /s/ Grady Ryther |
| Grady Ryther | |
| Chief
Executive Officer (principal executive officer) |
| August 12, 2026 | /s/ Katharyn Field |
| Katharyn Field | |
| Chief
Financial Officer (principal financial officer) |
The
foregoing certification is being furnished solely pursuant to Section 906 of the Sarbanes-Oxley Act of
2002 and is not being filed as part of the Report or as a separate disclosure document.