[NSA] NR Coverage when adjust inter-working eNB vs gNB ratio to 3 vs 1

Hello experts,

Im a newbie in industry, now we have question from operator as bellow
Currenttly 1 eNb inter-working with 1 gNb in NSA

Is it possible incase 3 eNbs inter-working with 1gNb?
In that case, how many percent that NR Coverage will be increased/decreased?

I really appreciate all of your comments, many thanks!