Can artificial stars be created?

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After the last stars burn out in the universe, can intelligent life survive by making artificial stars?

Pure speculation.

Try reading "The Last Question" by Isaac Asimov.

If there were enough matter preserved (ideally Hydrogen), with a high enough mass to be imploded into a critical fusion mass, absolutely. Storing and distributing that much mass, and creating an inward sphere of force with high precision, should be a piece of cake for humanity if we live that long.

If the last stars have burned out that means by assumption that most of the fuel is too heavy to fuse, or it is very dispersed.

Humanity would need to have stored enough energy to condense the remaining matter close enough together to form a star.

After that though, what are you gonna do.

Seems like it would be another climate change issue prior to that, where we'd need to explore turning stars off to extend galaxy lifespan.