When servers move to a new version
Bedrock servers follow the Bedrock client closely, because an out-of-date client can't join an updated server. Java servers that let Bedrock players in through Geyser have usually supported each new Bedrock release on its release day.
Checked September 27, 2026 against Mojang's release posts, the Minecraft Wiki and the PaperMC, ViaVersion and Geyser release records. Every version.