Is it possible to recover these projects somehow?
Somehow if they can make the demands of what the past investors or probably the current investors asking to them. But, in this crypto ecosystem, most of the dead projects will remain as a dead project. If they are already stumbling down, there is no cure for that.
They will remain as a dead project and the percentage of chance that they can be revived somehow is about 0.01%-1%. That's pretty low, do you have an investment with this kind of project?