Something else must be wrong then because I just copied and pasted that onto my raspberry pi and was able to start the container without issue.

user@raspberrypi:~/test $ sudo docker compose up 
[+] Running 10/10
 ✔ lidarr Pulled                                                           22.0s 
   ✔ 995f2a46b147 Pull complete                                             2.7s 
   ✔ e1cde46db0e1 Pull complete                                             3.1s 
   ✔ acaee427f4c7 Pull complete                                             3.5s 
   ✔ 255c3937324a Pull complete                                             4.1s 
   ✔ edec534df16f Pull complete                                             4.6s 
   ✔ b163a490af0b Pull complete                                             6.3s 
   ✔ bd4af268fa91 Pull complete                                             6.8s 
   ✔ ff4dab968553 Pull complete                                            14.9s 
   ✔ 004112d930a4 Pull complete                                            15.3s 
[+] Running 2/2
 ✔ Network test_default  Created                                            0.2s 
 ✔ Container lidarr      Created                                            4.0s 
Attaching to lidarr
lidarr  | [migrations] started
lidarr  | [migrations] no migrations found
lidarr  | ───────────────────────────────────────
lidarr  | 
lidarr  |       ██╗     ███████╗██╗ ██████╗
lidarr  |       ██║     ██╔════╝██║██╔═══██╗
lidarr  |       ██║     ███████╗██║██║   ██║
lidarr  |       ██║     ╚════██║██║██║   ██║
lidarr  |       ███████╗███████║██║╚██████╔╝
lidarr  |       ╚══════╝╚══════╝╚═╝ ╚═════╝
lidarr  | 
lidarr  |    Brought to you by linuxserver.io
lidarr  | ───────────────────────────────────────
lidarr  | 
lidarr  | To support the app dev(s) visit:
lidarr  | Lidarr: https://opencollective.com/lidarr
lidarr  | 
lidarr  | To support LSIO projects visit:
lidarr  | https://www.linuxserver.io/donate/
lidarr  | 
lidarr  | ───────────────────────────────────────
lidarr  | GID/UID
lidarr  | ───────────────────────────────────────
lidarr  | 
lidarr  | User UID:    1000
lidarr  | User GID:    1000
lidarr  | ───────────────────────────────────────
lidarr  | Linuxserver.io version: 2.12.4.4658-ls50
lidarr  | Build-date: 2025-08-20T02:50:40+00:00
lidarr  | ───────────────────────────────────────
lidarr  |     
lidarr  | [custom-init] No custom files found, skipping...
lidarr  | [Info] Bootstrap: Starting Lidarr - /app/lidarr/bin/Lidarr - Version 2.12.4.4658 
lidarr  | [Info] AppFolderInfo: Data directory is being overridden to [/config] 
lidarr  | [Debug] Bootstrap: Console selected 
lidarr  | [Info] AppFolderInfo: Data directory is being overridden to [/config] 
lidarr  | [Info] AppFolderInfo: Data directory is being overridden to [/config] 
lidarr  | [Warn] Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager: No XML encryptor configured. Key {bff9bf8a-f5db-4092-9ada-c55e886ac294}