There is a 29.0.0.1 in the "End of Open Liberty support" for version 8 at https://openliberty.io/docs/latest/java-se.html#supported
Does that mean January 2029?
https://www.ibm.com/docs/en/was-liberty/base?topic=liberty-removal-notices#rwlp_remfeat__29001_se8 <- we see in the Java SE 21 entry that "29.0.0.10" means October 2029, so yes.