It seems that after waybar version 0.14.0 wildcard includes no longer work properly.
The observed behavior is that only the first matched configuration from the wildcard seems to be included.

Simple poc follows.

Sample configuration tree:

.
├── config.jsonc
└── modules
    ├── cpu.jsonc
    └── memory.jsonc

Sample config.jsonc

// config.jsonc
{
  "height": 26,
  "spacing": 14,
  "include": [
    "modules/*.jsonc"
  ],
  "modules-left": ["cpu", "memory"]
}

Sample modules/cpu.jsonc

// modules/cpu.jsonc
{
  "cpu": {
    "interval": 2,
    "format": "goo: {usage}%"
  }
}

Sample modules/memory.jsonc

// modules/memory.jsonc
{
  "memory": {
    "interval": 2
    "format": "foo: {used:0.1f}G",
  }
}

waybar 0.13.0 result:

waybar 0.14.0 result:

As you can see the memory module configuration in the waybar version 0.14.0 is not applied.
Possibly caused by: #4333