Ok. Thanks. It looks like from your audiogram that you have a moderate to severe loss. Any of the custom instruments from Phonak should be able to handle this loss. However I am unsure what the advice is regarding a unilateral loss such as yours. A cros hearing aid is sometimes used, which enables transmission of sound to your good ear. Why that has not been done in your case, I do not know. I am only a hearing wearer so I would wait to see if any audiologists can comment on here.
Regarding hearing in noise, yes, it can be difficult but the technology should allow you to hear somebody in front of you, or to your side. This is because your aids will have a beamforming capability - even if there is only one aid, which will enable you to zoom in. More difficult is to pick out one talker in a group. This is a holy grail of hearing aid technology. What complicates the matter is that it’s not just whether you require amplification, but some people are able to perceive speech in noise better than others, with less amplification required.
I would personally go back to your audiologist, ask about REM, explain these issues and try to get your aids re-programmed.
One additional thought is to contact the NHS. I would personally do it because of their expertise. Even if they prescribed you a RIC, or you never know, a cros, generally the care and provision is professional.