ngFor is not working despite having CommonModule imported in the existing module

ngFor is not working in my code. I have the following code structure.

1. AppModule - contains App Component with router-outlet
2. HomeModule - contains Home Component - uses ngFor. (ngFor works here with no issues)
3. TestModule - contains Test Module - uses ngFor (ngFor does not work here)

I already have "BrowserModule" import in the AppModule. I also have "CommonModule" import in both HomeModule and TestModule

I have this code in HomeModule home.component.html file (Works as expected)


<mat-card [class]="(selected_test.id === test.id)? 'test-card selected': 'test-card'" *ngFor="let test of tests" (click)="selectCard($event, test)">

<div class="left">
<div class="title">{{test.title}}</div>
<div class="description">{{test.description}}</div>
</div>

<div class="right">
<div class="question-count">{{test.questions.length}} Question{{(test.questions.length > 1?'s':'')}}</div>
</div>

</mat-card>

I have this code in TestModule test.component.html:


<div *ngFor="let q of test.questions" class="question-item">
<div class="question-title">{{q.prompt}}</div>
<div class="question-options">
<!-- <div *ngFor="let option of question.options" class="question-option">{{option}}</div> -->
</div>
</div>

Code in snippet 1 works while the code in snippet 2 does not work. I am not sure what is going on with this.

Edit:

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatToolbarModule } from '@angular/material/toolbar'
import { MatCardModule } from '@angular/material/card';
import { HomeModule } from './pages/home/home.module';
import { CommonModule } from '@angular/common';


@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AppRoutingModule,
BrowserAnimationsModule,
MatToolbarModule,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

home.module.ts


import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { HomeComponent } from './home.component';
import { MatButtonModule } from '@angular/material/button'
import { MatCardModule} from '@angular/material/card'

@NgModule({
declarations: [HomeComponent],
imports: [
CommonModule,
MatButtonModule,
MatCardModule
],
exports:[
]
})
export class HomeModule { }

test.module.ts


import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { TestComponent } from './test.component';
import { BrowserModule } from '@angular/platform-browser';



@NgModule({
declarations: [TestComponent],
imports: [
CommonModule,
],
exports: [
TestComponent
]
})
export class TestModule { }

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