Nano 5

https://www.nano-editor.org/download.php

Has a scrollbar (indicator):

nano5d-fs8.png-Wyc4plwrozuKoxj-md

For slightly less anoying titlebar, in nanorc

set titlecolor white,black

What is active in that nanorc

cat /usr/local/etc/nanorc | grep -v ^# | grep .

returns

set historylog
set indicator
set mouse
set positionlog
set softwrap
set tabstospaces
set titlecolor white,black
include "/usr/local/share/nano/*.nanorc"
extendsyntax python tabgives "    "