I can't find her on there either, so perhaps we're both being a bit short-sighted! But anyway ...
There are several medal index cards which could be hers. There is one to a VAD who is named as 'Maude Wilson' with an 'e', but a more interesting one to a Maud Wilson, who served both with the British Red Cross Society, and with the French Red Cross. If Maude died while nursing the French, then she was not working in either a BRCS Hospital in the British Sector or in a British Military Hospital, so it seems quite possible that she had transferred to the French Red Cross (although there is a lot of assuming and supposition here!).TNA Documents Online
I would contact the British Red Cross Society to check if they have a service record for her - whichever one of the Maud(e)s she might be, it looks as though she worked for them at some time. Even is she was with the French Red Cross at the time of her death, Devonshire House are likely to have been informed.British Red Cross personnel records
If she died in France, in an area not under the control of the British, she should have a French death certificate. So it would be worth searching the RG35 series at The National Archives - 'Miscellaneous foreign deaths' and I think the actual microfilms in question would be RG35/43 and 44, which cover 1917. They would give her place of death, not her burial, but one would certainly be fairly close to the other.
Forum member Jim Strawbridge is compiling a volume of female casualties of the Great War, and she may be known to him - you could PM or email him if he doesn't see this thread.