SAP IBP Time profile attributes are not visible in Excel attribute selection

Hello Experts,

I am trying to add two new attributes which will provide me the information in excel that,

1. Attribute name: WEEKSDATE (Time Stamp)

It should give me information that W01 2020 starts with '06-Jan 2020'.

I can change it directly into "Period Description' but wish to keep both information for period1 i.e weeks

2. Attribute name: WKENDDATE(NAVCHAR)

W52 2020 is the X-mas week

I have created two new attributes in the Time Profile, downloaded the template where I can see the newly added attributes. and uploaded the relevant data in new attributes using the data integration job successfully.

But I can select these attributes in 'edit view' --> Attribute selection. I can see the standard attributes like 'Technical weeks weight factors'

, 'week within quarter' etc