They are in your inbox feed, and they are also grouped by counterparty under Private Chats just like other clients do.
nostr:nevent1qqst25aw059nhtwcklweyzvhqv7xde68lqjdfpd7488n9k43kpxqaegpzamhxue69uhkzapwdehhxarjwahhy6mn9e3k7mgpp4mhxue69uhkummn9ekx7mqpr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5qyd8wumn8ghj7mn0wd68ytndd94k2erfd3nk2u3wvdhk6qgswaehxw309ahx7um5wgh8w6twv5q3yamnwvaz7tm0venxx6rpd9hzuur4vgq32amnwvaz7tm9v3jkutnwdaehgu3wd3skueqpzamhxue69uhkummnw3ezu6r0d3ukyetp9e3k7mgpr4mhxue69uhhyetvv9ujumn0wd68ytnhd9ex2erwv46zu6nsqys8wumn8ghj7un9d3shjtt2wqhxummnw3ezuamfwfjkgmn9wshx5uqmhrnex