Blade if(isset) is not working Laravel

{{ $usersType or '' }} is working fine. The problem here is your foreach loop:

@foreach( $usersType as $type )
    <input type="checkbox" class='default-checkbox'> <span>{{ $type->type }}</span> &nbsp; 
@endforeach

I suggest you put this in an @if():

@if(isset($usersType))
    @foreach( $usersType as $type )
        <input type="checkbox" class='default-checkbox'> <span>{{ $type->type }}</span> &nbsp; 
    @endforeach
@endif

You can also use @forelse. Simple and easy.

@forelse ($users as $user)
   <li>{{ $user->name }}</li>
@empty
   <p>No users</p>
@endforelse

@isset($usersType)
  // $usersType is defined and is not null...
@endisset

For a detailed explanation refer documentation:

In addition to the conditional directives already discussed, the @isset and @empty directives may be used as convenient shortcuts for their respective PHP functions

Use ?? , 'or' not supported in updated version.

{{ $usersType or '' }}  ❎
{{ $usersType ?? '' }} ✅