There is another way to do it without issuing debt, but while still controlling monetary policy.
1. Provision "dividend.federalreserve.gov" CRUD app (or just dividend.gov for convenience). Create "Fed" accounts, very similar to what you get with a Social Security Administration account at https://ssa.gov. Accept routing and account numbers from citizens. Issue debit cards with no fees to the unbanked. Provide local service at Social Security offices.
2. The Fed slowly buys up income producing assets (equities, fixed income, etc), and distributes the gains monthly to everyone. Many central banks go on buying binges to support asset prices already (the Bank of Japan already owns a significant amount of the Nikkei [1]).
You will eventually arrive at a UBI supported by the economic productivity of your country. Alaska does something smaller with oil revenue already [2]. This also keeps with Fed mandates to maximize employment and keep inflation around their 2% target (inflation will never increase because of structural demographics, the shift to a service economy, the transition to EVs and renewables, etc).
[1] https://asia.nikkei.com/Business/Markets/Bank-of-Japan-to-be...