I don't know if any Presbyterian or Baptist churches teach/practice baptismal
regeneration, although I wouldn't be surprised if there are some given the current abandonment of biblical doctrine or even reading the Bible altogether. But, what I did mention in my response was presumptive
regeneration which is very widespread in paedobaptist churches. The Baptists have their own unique error in this matter of baptism too.
I cannot count the number of Baptist churches I have visited where 4-10 year old children are marched to the front of the church where the pastor said something to the effect as, "I understand you all asked Jesus into your heart this morning in Sunday School, right? Then I can tell you that you are all saved today. Now, go home and tell your parents that you want to follow Jesus in baptism and bring back a permission slip and we will baptize you." Yep, no need to get involved in the complexities of presumptive regeneration
Just declare little children are saved because they uttered some pre-written statement about Jesus. No real conviction of sin by the Spirit! No genuine repentance of sin! No true saving faith expressed! And how could that happen? Faith comes by hearing the Word of God." False so-called 'gospels' have no saving power whatsoever. Thousands of children on both sides are given a false assurance that God loves them and they are going to heaven.
Thankfully, God has preserved a remnant for Himself where these type of things never occur. Finding a church today is like finding a pot of gold at the end of a rainbow. Blasphemous 'worship', heresy of myriad forms, ignorance and even disdain of biblical teaching, striving to live a holy life is scoffed at, etc., etc. is what prevails throughout the visible Christian world churches. We need a Reformation that leads to a Revival, especially in the major denominations. For they may be churches that are only backslidden and capable of repenting and returning to their first Love. But..... not my will, but God's will be done.