I got some orders to create PlayAds with spine animation. I really wanted to make it with Unity Tiny, but found that Spine isn't yet working with ECS and Tiny.
So I spent some time and created my own plugin, which helped me to finish my projects. I'm selling it on the Asset Store now. It doesn't support all the Spine features yet, but it should be more than enough for a simple PlayAds game. It works only with Bones and Slot Attachments (Region) animations.
Before official Spine support is available, you can use my plugin: https://assetstore.unity.com/packages/slug/181832
If you need some additional features for me to cover, feel free to let me know. The Asset is paid, but one PlayAd order will pay it off for sure.