Samsung Phone (I love it has Scam, Spam Protection - Smart Caller ID.), Samsung Message (It supports RCS), Samsung Email (It works excellent with Microsoft Exchange, Contacts, Calendar, Emails Sync.) and at least Samsung Members. I'm not good on tweaks, themes but many says Good Lock is one of must have Samsung apps. Same here I'm using Galaxy Store to update Samsung apps for rest Google Playstore.
Samsung Galaxy Note 20 Ultra