Appreciate all the replies, thank you
I have been pointed to the account limits page from the help articles section of the Wirex help centre. There is a page on there ‘Wirex Cryptocurrency Account Limits’ that states all the cryptocurrencies handled by Wirex. Each one has an ‘on chain limit’ section. If this section states ‘N/A’ it means the cryptocurrency cannot at this time be sent direct to an account like I have asked about above.
I found this useful because I am able scroll down the list and see which cryptocurrencies I can currently send directly to my account from elsewhere (i.e. personal wallet → Wirex account).
Thanks again to the above posters