Some small reactor developers, including GE Hitachi, Westinghouse and Aalo Atomics are choosing LEU+ fuel, as opposed to HALEU fuel, because it will take a long time to develop a sufficient HALEU fuel supply chain. Article link in reply.
LEU+ fuel has uranium enrichment levels LEU fuel has enrichment levels up to 20%.
Urenco USA received an NRC license to produce LEU+ fuel at its large-scale uranium enrichment facility. No such supply chain exists for HALEU fuel, and will take years to develop one. GE Hitachi, Westinghouse and Aalo Atomics don't believe that a HALEU fuel supply chain will exist when they want to start deploying their reactors.
The companies may switch to HALEU after the supply chain is built.