England won the current series series 4-3. This was the first 7-match T20I series between full members, although there has also been one between Malawi and Mozambique earlier this year. These were the first T20Is played by England in Pakistan.
A summary of all T20Is between England and Pakistan:

England leads overall, as well as at home, away and at neutral venues.
Individual performances:
Batting:
Most runs (200 and above):

Led by the opening pair of Babar Azam (560) and M Rizwan (522).
Highest innings (70 and above):

The only two centuries are by Babar Azam and LS Livingstone.
The most 50+ scores are 6 by M Rizwan and 5 by Babar Azam.
PD Salt’s 88* is the best for England in Pakistan.
There is not enough data for meaningful calculation of averages.
Best strike rates (Minimum 250 balls faced, all instances):

Headed by Babar Azam and EJG Morgan.
Bowling:
Most wickets (8 and above):

AU Rashid and GP Swann have 17 wickets each, while Haris Rauf (14) has the best for Pakistan.
There are two instances of 4wi, by Saeed Ajmal (4-21) and AU Rashid (4-35).
Innings bowling (3wi and above):

MA Wood’s 3-20 is the best for England in Pakistan.
Wahab Riaz’s 3-18 is the best for Pakistan in England.
Fielding:
Most dismissals (6 and above):

Morgan has the most catches by a fielder (12). Buttler has the most dismissals by a keeper (7 including 5 stumpings).
Most innings dismissals (3 and above):

No England player has made 3 dismissals in a match in Pakistan.
This list includes a number of keepers and fielders.
Buttler is the only one with 2 stumpings in an innings.
All-round performance:
Minimum 20 runs and 2 wickets in a match:

The best performances here would be by MM Ali (36 and 2-32) and Shahid Afridi (24 and 3-15).