Well, lets see how this works, this "kai" means "after that" and mandates sequence...
Let's look at the verse you already brought up in order to prove that FIRST one must repent of their sins and AFTER THAT we are no longer forbidden to baptize them (it's the point you were making at the time). You used the same "kai" = AFTER THAT IS COMPLETED meaning....
Acts 2:38 "Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins and you will receive the gift of the Holy Spirit."
Your whole premise then and now, in this verse and any in reference to Baptism, is that the mandated meaning of "kai" is 'AFTER THAT' and it's purpose is to require sequence, chronological order. You (and all Anabaptists on this point) use this to prove that repentance must come before baptism - and since those under the age of X cannot repent, they cannot be baptized.
Let's examine your hermaneutic there. So, this verse is proving a certain SEQUENCE, a CHRONOLOGICAL ORDER that must happen this way and must be forbidden to happen otherwise:
The DEAD person (Peter says this to unbelievers) must
1. Repent (including turning to God in faith for mercy and forgiveness) THEN AFTER THAT IS COMPLETED AND DONE...
2. Be baptized (passive receiver) THEN AFTER THAT IS COMPLETED AND DONE, NEVER BEFORE...
3. Receive forgiveness THEN AFTER THAT IS COMPLETED AND DONE, NEVER BEFORE...
4. The Holy Spirit comes THEN AFTER THAT IS COMPLETED AND DONE, NEVER BEFORE....
So, what does that do to your Calvinist and Monergist view of soteriology (I;ve brought this up with two other Scriptures you keep quoting and requiring this identical "kai-requires-sequence" apologetic but you've always skipped it). It means that the DEAD person must perform the good work of repenting - which includes turning to God in faith for mercy and forgiveness - this coming from a DEAD person! THEN, only that step is completed and done and finished, only then, next he is no longer forbidden to be baptized and indeed should be (a second good work done by a DEAD person). THEN, only when that step is completed and one and finished, he (this DEAD man) will receive forgiveness (because the dead man did two good works), and THEN after that step is done and completed and finished, the Holy Spirit will do His work of giving life and faith.
If you read that, yeah- your spin helps your baptism argument but it destroys the Christian Gospel! Maybe your whole apologetic here is.... well..... not correct?