Issues with for loop when switching from radio to checkbox - wordpress

Question

We have a wordpress site using Twig and advanced custom fields to show a custom post type value on a page. There used to be just one value for the role field and we used radio buttons. We had to switch that to checkboxes because multiple roles need to be selected for some posts.
That went fine but now the for loop that we had in place doesn’t work for posts with multiple roles selected. It still displays posts which have one role selected, however. I’d appreciate any help with this as it’s written in Twig and that’s completely foreign to me! Is there a way to check for both conditions and something different for each? Or is there a way to edit every existing post to update the field so that it will always return an array?
Tried checking with ACF support but they were not familiar with using twig.
This is the .twig page.
<section class="section people">
<div class="row row-17-column">
<h1 id="team" class="header-large center">Our Team</h1>
<div class="bio-profiles">
{% for team in team %}
<bio-profile bio-id="'{{team.ID}}'" :bio-length="{{team.biography|length}}">
<img slot="photo" src="{{TimberImage(team.photo).src}}" alt="{{TimberImage(team.photo).caption}}">
<h3 slot="name" class="header-small full-width">{{team.first_name}}<br>{{team.last_name}}</h3>
<p slot="position" class="profile-position">{{team.job_title}}<br />{{team.company}}</p>
<div slot="related" class="related-stories hide-small"></div>
<p slot="quote">“{{ team.quote }}”</p>
<p slot="bio">{{ team.biography }}</p>
</bio-profile>
{% endfor %}
</div>
</div>
</section>
Here is the array that needs to be modified to pull in more than one value. They could also have a value for director or advisor along with team. there are 3 total value options.
$team = Timber::get_posts(
array(
'post_type' => 'person',
'meta_key' => 'last_name',
'orderby' => 'meta_value',
'order' => 'ASC',
'posts_per_page' => -1,
'meta_query' => [
array(
'key' => 'role',
'value' => 'team'
)
]
));
When we switched from radio to checkboxes It still displays posts which have one role selected but if there is more than one, they don't display at all.

Answer 1

As has been highlighted, you're doing a query to bring back the role team as opposed to all the roles you've now added. Changing your loop to the following should be sufficient, simply update the $roles array with the value of each of your roles:
$roles = array('team', 'director', 'advisor');
$team = Timber::get_posts(
array(
'post_type' => 'person',
'meta_key' => 'last_name',
'orderby' => 'meta_value',
'order' => 'ASC',
'posts_per_page' => -1,
'meta_query' => [
array(
'key' => 'role',
'value' => $roles,
'compare' => 'IN'
)
]
)
);