The J20s with new domestic engines deserve different designation from those with Russian engines. May be we could temporarly call them J20A until there is official confirmation.
Also it would be interesting to estimate the production of J20(A?) since 2020 to August 2021. Probably they could have rolled out two production batches already.
Edit: just check Huitong's blog. He already called them J20A. So now we have J20 with Russian engines, and J20A with WS-10C engines. He also said there are 2 production batches of J20A already in PLAAF's service. So we should expect 3rd batch.