Does Renata Glasc, Industrialist allow Leblanc's Reflection tokens to enter ready?

Yes, Renata Glasc, Industrialist allows Reflection tokens created by Deceiver (LeBlanc) to enter play ready.

Reasoning

1. Renata Glasc, Industrialist: This unit has the passive ability: "Your tokens enter ready."
2. Deceiver (LeBlanc): This legend has a triggered ability that includes the instruction to: "play a ready Reflection unit token there."
3. Interaction: When an effect creates a token, it follows the rules specified by the effect. A passive ability that modifies how tokens enter play acts as a continuous rule affecting your game state. Because Renata’s ability explicitly states that your tokens enter ready, it applies to any tokens you create, including the Reflection tokens from Deceiver.

Note on Timing and Redundancy

Even without Renata in play, Deceiver already instructs you to play a "ready" token. Since the token is already entering ready by the instruction of the Deceiver ability, Renata's ability provides a redundant benefit in this specific case—it does not change the outcome because the token was going to enter ready regardless. If you were using an effect that created tokens without the "ready" designation, Renata's passive ability would then be the active effect ensuring they entered the board in a ready state.

Note: I could not fully verify this ruling against the retrieved rules.