The animations available that are public and free fall under the Lottie Simple License
Permission is hereby granted, free of charge, to any person obtaining a copy of the public animation files available for download at the LottieFiles site (“Files”) to download, reproduce, modify, publish, distribute, publicly display, and publicly digitally perform such Files, including for commercial purposes, provided that any display, publication, performance, or distribution of Files must contain (and be subject to) the same terms and conditions of this license.
Modifications to Files are deemed derivative works and must also be expressly distributed under the same terms and conditions of this license. You may not purport to impose any additional or different terms or conditions on, or apply any technical measures that restrict exercise of, the rights granted under this license. This license does not include the right to collect or compile Files from LottieFiles to replicate or develop a similar or competing service.
You may use these in your web and app products. Use of Files without attributing the creator(s) of the Files is permitted under this license, though attribution is strongly encouraged. If attributions are included, such attributions should be visible to the end user.