You need to compact it a bit otherwise it will sink over time and be left a bit lower than the rest of the lawn. This can be done by walking in tiny steps slowly across the surface. If necessary then rake it level again and repeat the steps. You might want to leave the seeding until spring as it is probably too cold now for it to germinate.
Just reread your post and saw that there were slabs there before so it should be well compacted already. So a raking to break up the clods a bit and to level off should be sufficient. If you move a lot of soil in the process, some trampling to compact it again might be necessary.
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