In Fundraise Up the following fields are available via the Donations Endpoint, but not in the Connector Fields.

dafexternalid
string or null
required
The external grant ID assigned by Chariot to the Donor-Advised Fund (DAF) grant. Returns null unless payment.method is daf.

Example:
010c5aa7-28f5-426f-b31f-9ba77754055f
dafsponsorfund
string or null
required
The name of the Donor-Advised Fund (DAF) sponsor organization. Returns null unless payment.method is daf.

Example:
Fidelity Charitable
daftrackingid
string or null
required
The Chariot tracking ID of the Donor-Advised Fund (DAF) grant. Returns null unless payment.method is daf.

Example:
1e60800e-849b-43d1-870e-57afc8d75473