Peng had accused Chinese former Vice-Premier Zhang Gaoli of sexual assault in 2021 in a post on social media that was soon removed from the country's internet. She later denied having made the accusation.
Peng's post caused an international outcry over her safety and led the WTA to suspend tournaments in China - a decision expected to cost the women's tour hundreds of millions of dollars in broadcasting and sponsorship.
A provisional 2023 tournament calendar released late last year listed the WTA's schedule up to September, but there was no clarity on events to be held in China.
"There has not been any change in the WTA position on a return to China and we have only confirmed our 2023 calendar through US Open," the WTA said in a statement.
"A return to the region will require a resolution to the Peng situation in which she took a bold step in publicly coming forth with the accusation that she was sexually assaulted by a senior Chinese government leader.
"As we would do with any of our players globally, we have called for a formal investigation into the allegations by the appropriate authorities and an opportunity for the WTA to meet with Peng - privately - to discuss her situation."
The WTA said it had received confirmation Peng was safe and comfortable but were yet to meet with her personally.
"We continue to hold firm on our position and our thoughts remain with Peng," the statement added. "The WTA continues to work towards a resolution.
"While we have always indicated we are hopeful we will be in a position to again operate WTA events in the region, we will not compromise our founding principles in order to do so."
In July last year, men's governing body ATP had cancelled its events in China due to the COVID-19 crisis in the country.
