You can try to use iPhone Data Recovery
. It can scan your iPhone 8 and iPhone 8 Plus deeply to find the deleted and lost contacts for you. You can preview them before recovering. learn how to recover deleted contacts from iPhone 8
. Besides contacts, you can also recover messages, photos, videos, contacts, call history, notes, reminders, calendars, voice memos, voicemail, safari bookmarks, Whatsapp messages and other deleted data for you.