Thank you for contacting Telerik Support.
In regards to your query, I would like to point you to our quick verification tool page of our online documentation. I believe the verification you are looking for is the "Wait - element exists" from the Quick Tasks section. This would conduct a verify on the element at a CheckInterval until reaching a final Timeout, the value of which can be changed to fit your needs in the properties tab of the step. However in order to use this verification in an IF logic step you will have to change its role from a Wait to a Verify by right clicking on the step -> Change Role -> Set as Verification.
Please let me know if this proposed solution helps!
the Telerik team