It does not matter escaped or symbols in the docker compose are added to the server.properies file as Unicode symbols. This is the whole point of the issue. The minecraft server then converts these wrong (which is the minecraft issue) thus causing the annoyance. Hang on...I went back ...
FEF00~FEF3F - Featural Minecraftian FEF40~FEF9F - African Transitional FEFA0~FEFFF - <reserved for Erictom333> FF000~FF05F - Vexillology Symbols FF060~FF0FF - Miscellaneous Technical Extended-1 FF100~FF16F - Control Pictures Extended-1 FF170~FF1FF - Segmented Display Patterns FF200~FF2...