Not v2.3-r that is the last of the line. Android 11 (R) is no longer supported by /e/OS.
When considering what one can build next consult the Release | tags page Tags · e / os / 🚀 Releases · GitLab.
If I search for v1-r it does not appear till page 3 as
v2.3-r
584ffa80 · Update v1-r manifest · 5 months ago
For s, t, u a search of v1-x will show where this tag points when you are planning what tag / branch to use.
But I now see the device tree for a5y17lte does run to Lineage-19 GitHub - LineageOS/android_device_samsung_a5y17lte so you may well be able to try v1-s.