I know some would say it is either a joke or a baseless claim, but I have some very reliable contacts to Pakistan, which noted this too.
According to these reports, there was - reasons were not given but my gut-feeling tells me, that most of all Russia has issues to comply with the support guarantees / Russia cannot keep its promised deliveries of spares and maintenance (?) and the Russian engines are no longer better than the Chinese ones - that there was a small batch of interim aircraft using the improved RD-93MA and - again per my gut-feeling - all JF-17Cs built in 2023 are indeed said to use the WS-13.
You all know my stance "only seeing is believing" but the source I have is reliable; I trust him even if I need proof to be sure.
They all look the same to me as well. Is there any plan to order more of these aircraft after the Block III purchases are over?
Talk that Russia cannot deliver spares sounds like bullshit to me. The factory these engines are being produced in, Salyut, is lightly loaded right now. The only other program of note they are in is the Al-222 engine for the Yak-130 but they don't produce that many of them right now. What might be a problem is issues with international payments due to financial sanctions. Which could be easily solved by either paying in Yuan or getting a loan from Russia. i.e. get Rubles and pay those back later with exports.
2nd squadron of block-III has already been raised, meaning that 32–36 aircraft have been entered on active duty while the third squadron is in the making; therefore, it's safe to assume that the overall number of JF17s will soon approach 200.
While, it is quite likely that the L15B induction will result in the discontinuation of new JF17 production. Instead, the PAF will concentrate on enhancing block-I and block-II aircraft (new power plant, newest avionics, integration of new armament suites) to bring them up to speed with block-III standards.
What exactly is your question by circling the MAWS?
On JF-17 Block 1 and 2 (rightmost picture being an example of it), the rear facing MAWS is installed at the base of the tail, while on JF-17 Block 3 (leftmost and middle pictures being examples of Block 3 airframes) the rear facing MAWs is installed at the top of the tail.