There aren’t plans to launch an identical telescope. Perhaps the costs of manufacturing and testing are high enough that we might as well launch a different telescope with different capabilities?

The Roman Space Telescope is a wide field instrument that is now under development and slated to launch in 2026 [1]. The Astro2020 decadal survey from the National Academies also recommended “a large (~6m diameter) Infrared/Optical/Ultraviolet space telescope” to observe exoplanets [2].

[1]: https://spacenews.com/nasa-selects-falcon-heavy-to-launch-ro...

[2]: https://nap.nationalacademies.org/resource/26141/interactive...