it would be great when creating keyframes, you could place keyframes before and after the start and end of a clip so that it is already in motion before it appears in the monitor.

eg, this is the animate forum, https://community.adobe.com/animate-538

If this a request for Premiere, then Post this in the Premiere forum (you may need to change the title slightly to avoid a duplicate post error):

https://community.adobe.com/p/premiere

Or choose another appropriate forum here:

https://community.adobe.com/community