Super weird but it may be a browser thing. I see you have been assimilated mail wise but whichever browser should show both a red post reply and next to the time stamps a double arrow reply with a dropdown next to that which I've not played with but I use the double arrow clickee to reply with the quotes.
A shot of the reply view I see
https://drive.google.com/file/d/1IzaFC-njtwzV76zGURPOGYNhZXZ3L6ii/view?usp=sharing
Then there are the mails direct option. I'll admit to getting sucked into the Chrome trend, as I spend most of my time on a chromebook (a webbie for the era).
I used to dote on Opera but they screwed around with my favorite version and Chrome has been slowly catching up with the Mozilla and Opera advantages.
Zonker
>Sleepless in Pascoag now, lost in the RI redneck quadrant