In one of the last episodes, they are looking at a camp list and it says to pack 'Ladies Items'. The further going on to mention pads and tampons

In the wedding episode, one of the girls gets her period, then further being told how to put on a pad

Some kissings (mostly between adults) and a brief kiss scene between two middle-schoolers

In episode 1, a character mentions that she has a college level art class and she would be drawing people nude. She also says "I'm not nude, they're nude" (she is a 12 year old)

Two quick kisses. between some teens

Season 2 is more open about the topics like having baby's and "doing it with the right man" but it's all in a brief description that'll go over kids heads but parents might get it

Mentions New friend's dad is gay and reason for divorce

Says, "Oh my god" multiple times.

Some lighter words like 'idiot' are used

One character jokes about asking for the key to the liquor cabinet, but it is only a slight tease.

There's a discussion of menstruation in season 1.

There's an episode is s1 where there's this person who calls people from inside there own home. This might freak kids out. However it is only talked about nothing shown or done.