holographicdispalys didn't support 1.20.4, Lot of request to add decentholograms support on discord "yes i will add this" ~developer said year ago, now I joined his discord again
1. On updates I can't view history (XDDD)
2. 0 updates
3. Developer ignore my questions

suggested to author on discord to add decent holograms becauseholographic displays is outdated. He said that he start make it. Lot of problems, not understanding from author. Now there is 6 months (december) after last message because with this ignoring (pinged him 10 times) i left the discord - still no update but stupid adding support "for newest holographic versions" lmao xD

Maybe I did not use it correctly, but I doubt that I made a mistake somewhere. I have two hologram plugins, the first is HolographicDisplays and the second is DecentHolograms, and none of them accept your placeholders, even if you install Statsapi, everything doesn't work exactly. In general, my opinion is that the plugin does not work on Spigot version 1.19.3