The cache is at the posted coordinates. You may sign with a Note and log a Found later once you qualify. If already qualified, sign it and log your Found It at the same time.
This is a challenge cache. In order to log this find, you must have found caches with the four new attributes released in September 2020. Each attribute must have been in 5 or more of your finds. You can achieve this with a minimum of 20 finds (5*4). In other words, you have accumulated the four new attributes 5 times each. You can verify that you meet this criterion by using this challenge checker:
Challenge cache attribute
Though challenge caches are a type of Mystery Cache, the coordinates in the cache listing most often match the physical cache location. The challenge to claim a find on a challenge cache lies in having to accomplish a series of geocaching related tasks defined by the cache owner before logging the cache online—in addition to finding the cache container and signing the physical logbook, of course.
Bonus cache attribute
A bonus cache is a Mystery Cache for which you have to find clues in other caches. Sometimes the coordinates for the bonus cache are in one other cache. In other cases, you gather clues for the final coordinates of the bonus cache from multiple other caches. Clues for a bonus cache can be hidden in any other cache type.
Power trail attribute
A geocaching power trail is a large number of caches, often placed at minimum distance (0.1 miles, 161 meters) to each other, hidden along a walking, biking, or driving route. It often promotes a player’s ability to easily increase their find count.
Geocaching.com solution checker attribute
To help geocachers ensure their solved coordinates are correct before they go to find the final container, cache owners can solution checker to their Mystery Caches.