That's very reasonable, if true. That's in the neighborhood of the diesel upcharge.Toady's MarketWatch article:
No affiliation, not an endorsement, they didn't show their work, but with that said...
"We expect 2021 Jeep Wrangler 4xe pricing to start at just under $40,000."
Depending upon which model (Sport? Sport S?) the base 4xe most closely compares, this would represent an up-charge of $5k - $8k. Again, they provided no rationale for their number.