You can watch a trailer for the special on YouTube, and here's the short description of the show:
To Mom (And Dad), With Love is a sweet Mother’s Day celebration of friendship and family featuring the beloved Peanuts gang. While the other kids are excited to celebrate the special day, for Peppermint Patty it’s just a reminder that she didn’t grow up with a mom. With her good friend Marcie by her side, she soon realizes that real families come in all shapes and sizes, and that Mother’s Day is an opportunity to thank that special person in your life who means the most to you. Meanwhile, Snoopy and Woodstock embark on an epic adventure to find Woodstock’s long-lost mom.For more information about Apple TV+, including how to watch and subscribe, visit tv.apple.com and this Apple support page.