I enquired about my certificate last day at
NationalitySupportTeamFMT@homeoffice.gov.uk and got a replay as below.
It didn't help at all and added more confusion

Did they ask to wait for another 8 to 12 weeks? or is it a generic email? Confused now! I am approved on 7th October.
Thank you for your enquiry about your citizenship ceremony.
We are currently working with Local Authorities throughout the UK and with overseas diplomatic posts as they begin to resume Citizenship Ceremonies. Service has not yet returned to normal due to continuing adherence to Government advice on social distancing ¿ which is subject to some local and International variance.
Due to the strict social distancing measures currently in place and to ensure the safety of our staff, regrettably, resources in our Ceremonies and Citizenship Support department are extremely limited, at present.
With regards to individual/private/virtual ceremonies, we are aware that some local authorities have already started to offer this service however it is up to each council as to whether or not they can carry out these with social distancing measures in place. Further to this, unless you have exceptional circumstances, we are unable to accommodate requests to expedite ceremony invites/despatch of certificates at present for the reasons given above.
Please be assured that our ceremonies and citizenship support team will issue your ceremony invite letter by post within the next 8 to 12 weeks. You are required to attend a citizenship ceremony within 6 months of the date printed on your ceremony invitation. Upon receipt of the invitation letter, you can make the necessary arrangements with your local authority.
We will keep ceremony deadlines under constant review. Please be assured that no adverse decisions will be made on your application because of delays caused by Coronavirus (unless there is a material change in your circumstances, for example, you are convicted of a criminal offence).
Please do not contact your Local Authority until you have received your invitation as they will not have your certificate to conduct your ceremony before this.
I fully appreciate that you attending your citizenship ceremony is the final part of the process and please be assured that we aim to resolve this situation as quickly as possible.
During this time UKVI are receiving a high volume of enquires that may take longer than usual for a reply. Please do not contact the Visas and Citizenship department to request your ceremony be held in another location based on ceremony date availability as such requests cannot be accommodated and will be declined.
Yours sincerely
FMT Admin Support Nationality Group