Angular ng-content not working with mat-form-field

My goal:

I'm trying to build a reusable mat-form-field with a clear button.

How I tried achieving my goal:

I created a "mat-clearable-input" component and used it like this:

<mat-clearable-input>
        <mat-label>Put a Number here pls</mat-label>
        <input matInput formControlName="number_form_control">
    </mat-clearable-input>

mat-clearable-input.component.html

<mat-form-field>
    <ng-content></ng-content>
</mat-form-field>

Expected result:

the ng-content tag takes the label and the input and puts them inside the mat-form-field tag.

Actual result:

Error: mat-form-field must contain a MatFormFieldControl.
    at getMatFormFieldMissingControlError (form-field.js:226)
    at MatFormField._validateControlChild (form-field.js:688)
    at MatFormField.ngAfterContentChecked (form-field.js:558)
    at callHook (core.js:2926)
    at callHooks (core.js:2892)
    at executeInitAndCheckHooks (core.js:2844)
    at refreshView (core.js:7239)
    at refreshComponent (core.js:8335)
    at refreshChildComponents (core.js:6991)
    at refreshView (core.js:7248)

It looks like I'm missing something and I'm not using correctly the ng-content tag.

I wasn't able to locate the documentation for the ng-content tag on the angular website.

Thank you for any help.

from Angular ng-content not working with mat-form-field