Author name on main page not showing up - php

Question

On my main page, I have posts that underneath have the author name. Or well, should. However nothing actually appears and I'm not sure why they aren't showing. On my sidebar.php they do show up. I've tried to see if there was actually something appearing and not being hidden by CSS, however nothing appears at ALL from the get_the_author() on the front-page
Heres my front page code:
$result = wp_get_recent_posts(array(
'numberposts' => 1,
'category' => '',
'post_status' => 'publish',
));
foreach( $result as $p ){
?>
<!-- The card itself-->
<div class="card cardcustom">
<!-- The image -->
<img class="card-img tinted" src="<?php echo get_the_post_thumbnail_url($p['ID'], array(1438, 500)); ?>" style="height: 500px; object-fit: cover; border-radius: 0px;"/>
<!-- Text over the image -->
<div class="card-img-overlay card-content">
<p href="#" class="card-text the-badge badge badge-primary"><?php
foreach(get_the_category($p['ID']) as $category) {
echo $category->name . ' ';
}
?></p><br>
<p class="posttitle card-text" style="font-weight: 600; font-size: 16px;">
<?php echo $p['post_title']?></p><br />
<?php
$authorname = get_the_author();
echo '<p class="authortext card-text">From ' . '<strong class="colorauthor">' . $authorname . '</strong>' . '</p>';
?>
</div>
</div>
<?php
}
?>
And here is the code on my sidebar:
$result = wp_get_recent_posts(array(
'numberposts' => 8,
'category' => '',
'post_status' => 'publish',
));
foreach( $result as $p ){
?>
<!-- The card itself-->
<div class="card cardcustom">
<!-- The image -->
<img class="card-img tinted" src="<?php echo get_the_post_thumbnail_url($p['ID'], array(440, 240)); ?>" style="border-radius: 0px;"/>
<!-- Text over the image -->
<div class="card-img-overlay card-content">
<p href="#" class="card-text the-badge badge badge-primary" style="border-radius: 0px;"><?php
foreach(get_the_category($p['ID']) as $category) {
echo $category->name . ' ';
}
?></p><br>
<p class="posttitle card-text" style="font-weight: 600; font-size: 16px;">
<?php echo $p['post_title']?></p><br />
<?php
$authorname = get_the_author();
echo '<p class="authortext card-text">From ' . '<strong class="colorauthor">' . $authorname . '</strong>' . '</p>';
?>
</div>
</div>
<?php
}
?>
They're almost identical but for whatever reason it refuses to show up on the main page. You can see what I mean from the screenshots below:
MAIN PAGE:
https://gyazo.com/947f49090fd90a4068725a3968e1e205
SIDEBAR ON A DIFFERENT PAGE:
https://gyazo.com/b9325be19f388dc2d64ae2fe502e3ba4

Answer 1

get_the_author() uses the global $authordata.
And wp_get_recent_posts() doesn't alter the main query (because it uses get_posts() under the hood).
I guess on that sidebar it loads the author of the current page. To verify create another page with another user and try to see if the author changes.
I would suggest you get the author name by get_the_author_meta('display_name', $p->post_author); (replace get_the_author_meta with the_author_meta for simply displaying it).