The release planning etc. is done by VMware
Spring Data Neo4j 5.3 is part of the Neumann release train and this will be EOL Feb. 22. ( Release Train Neumann · spring-projects/spring-data-commons Wiki · GitHub)
But most heavy-lifting is done by Neo4j-OGM (3.2) in the background and we agreed on supporting this as long as Neo4j 4.x is supported (Something end '23, I don't have the numbers at hand).
So even if a SDN 5.3 should not run with a certain version of a future 4.x release or there is a bugfix in OGM, you can always update to the latest Neo4j-OGM version to get the needed fixes.
