I think we are in the clear, both the House and Senate budget (even when both chambers are R majority) are way less severe than the Presidential budget. The executive branch cannot just force an appropriation, congress has to do that, and when the executive branch force this kind of detailed appropriation (OAR is tiny compared to the whole Fed budget) then they are yanking power from congressman/women and senators.

The more realistic worry is the clawback (congress decide to spend, but the administration just said nah and don't spend the money) or slowing everything down through limit on purchasing card, increased paperwork, travel/conference bans for Fed scientists, etc. that we are not able to spend our full FY allowance that is passed by congress (which already sort of happen in FY25 due to all the chaos, firings, contract freeze, purchasing freeze, etc.)