We present a study of Ξc0→Ξ0π0, Ξc0→Ξ0η, and Ξc0→Ξ0η′ decays using the Belle and Belle II data samples, which have integrated luminosities of 980 fb−1 and 426 fb−1, respectively. We measure the following relative branching fractions (Formula presented.) for the first time, where the uncertainties are statistical (stat) and systematic (syst). By multiplying by the branching fraction of the normalization mode, BΞc0→Ξ−π+, we obtain the following absolute branching fraction results (Formula presented.) where the third uncertainties are from BΞc0→Ξ−π+. The asymmetry parameter for Ξc0→Ξ0π0 is measured to be αΞc0→Ξ0π0=−0.90±0.15stat±0.23syst.
