An entity created (mostly via API) does not appear in Reltio UI search, but the same entity JSON can be retrieved in a get entity API response.
Invisibility to a Reltio UI search can be an issue when the entity system attributes for start date (startDate) and end date (endDate) values were populated, but the user provided a future date value in long number format.
To resolve this, check the start date and end date values and compare them with the current date. Start and end dates are defined as follows:
Start date: The start date that the entity or relation became (or will become) active in the system.
End date: The end date that the entity or relation stopped (or will stop) being active in the system.
Even when the end date is a future date, the start date should not be a future date in order for an entity to be active. If an entity's start date is a future date, then the entity is considered inactive.