Thank you that did resolve the issue. I guess creating the file /includes/extra_configures/samesite_cookie.php will make it apply to the entire site vs having the code in init_session.php (I guess this applies to session creation only)

Code:
$samesite = (defined('COOKIE_SAMESITE')) ? COOKIE_SAMESITE : 'lax';
if (!in_array($samesite, ['lax', 'strict', 'none'])) $samesite = 'lax';