I've got bad news, the IOS version of NWNEE is currently behind the PC version. I know that most of the issues listed are working correctly on the PC version of EE/PRC.  I can only assume that the version difference is causing the issues you are experiencing.  Unfortunately, this is out of our control, but Beamdog is working on getting the mobile versions "caught up".

Hey there! I was playing through and wanted to be a Redspawn Arcaniss but to my surprise it's not a dragonblooded subtype. Is it possible to fix this or give them the dragonblooded feat? Or did I miss something in the reading of the description? I think it's super funny and a bit odd that I can take the Draconic Heritage feat for white/silver dragons but that more a failure of 3.5 system and beyond the scope of what I'm asking.

Which version of PRC and NWN are you running?  The mobile versions unfortunately can lag behind the PC version and may be causing the issue.

4.1.5
Arkamoi, Lashemoi, Turlemoi, Hadrimoi, Redspawn Arcaniss races

Fixed Secondary Natural Attacks having extra attack penalties
Fixed Emitter issues for certain VFX (by shadguy)
Fixed PnP Shifter not being able to grant bonuses over +12 (by barmlot)
Fixed TLK issue with Manticore Belt meld
Fixed accidental nudity caused by chakras blocking items
Made Incarnum Natural Weapons more reliable
Fixed PnP Shifter Learn Shape not working
Fixed TLK issue with Natural Spell feat
Fixed Shadow Mantle Shoulder Bind not working
Cleaned up Truenaming Laws
Fixed GetCreatureSize function working incorrectly for PnP Shifter
Fixed PnP Disarm occasionally not working on enemies with high numbers of attacks
Fixed PnP Shifter incorrectly increasing mental stats (by barmlot)
Fixed PnP Disarm and Trip not granting iterative attacks
Fixed Dragon Disciple NA bonus to be PnP
Fixed Dragon Disciple missing Blindsight
Fixed PRC size increases stacking benefits
Fixed Talon of Tiamat getting too many breath weapon uses
Fixed Level Adjustment eating extra XP when loading into a game
Fixed Races that emulate sorcerer levels having incorrect caster levels
Fixed Drider/Rakshasa/PnP Shifter TLK issues - it now mentions these races add sorcerer casting
Fixed Natural weapons occasionally granting extra attacks to normal weapons
Fixed Drider granting the wrong feat on character creation
Fixed Monstrous Casters (Rakshasa, Drider, Arkamoi, Redspawn Arcaniss) not granting access to prestige classes
Fixed Monstrous Casters (Rakshasa, Drider, Arkamoi, Redspawn Arcaniss) not benefiting from prestige classes
Added Factotum's Cunning Brilliance ability. Factotums over level 19 will need to relevel to gain the ability

I got the ability trough incarnate class, when i did use it it let me choose from a list of soulmeds (alphabetically ordered, so not the same list as you after rest) but does not allow me to unshape any soulmed.
When i goes on invest essentia the soulmed recently choosen does not appear.
I can see the soulmed on feats list.