Here is how I got #citrine to work as both a local relay and as an exposed onion service as outbox relay on my phone. Thanks to nostr:nprofile1qqsda2memtapc2lykjnd8t9px4ake2stw39lg6k49xj6u3jz3pteu6qppemhxue69uhkummn9ekx7mp0qyghwumn8ghj7mn0wd68ytnhd9hx2tcpzfmhxue69uhkummnw3eryvfwvdhk6tcf3g7ce for the idea!

Download Citrine and start as local relay

Open Orbot
Tap more
Tap onion hosted services
Tap user services
Tap +

Add any name to service
Add 4869 to both ports

Hit save 
Exit from orbot
Restart orbot by closing out or force close
Restart orbot and connect orbot vpn again
Tap hosted services and copy new onion url

Open #Amethyst and go to relays
Add ws://yournewonionaddress. onion:4869 to outbox relay
Remove any other outbox relay
Hit save

nostr:nprofile1qqs827g8dkd07zjvlhh60csytujgd3l9mz7x807xk3fewge7rwlukxgpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7qgswaehxw309ahx7um5wghx6mmd9usjfpck nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcpz9mhxue69uhkummnw3ezuamfdejj7qgwwaehxw309ahx7uewd3hkctcscpyug nostr:nprofile1qqsr7acdvhf6we9fch94qwhpy0nza36e3tgrtkpku25ppuu80f69kfqpr9mhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmnt9uq3zamnwvaz7tmwdaehgu3wwa5kuef0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7eyerqr
#nostr