Compared to June, there are far less kpop girl groups debut or comeback at July, which leads to less competition.
GFriend - Apple
On June 17, it was announced that the group would make a comeback with their ninth EP:Song of the Sirens. It was released on July 13 with the lead single "Apple". On June 17, 2020, a source reported that: "GFriend recently wrapped up filming the music video for their title track. Throughout the filming, the staff on set were surprised by GFriend’s shocking transformation. The song debuted and peaked at number 54 on the Gaon Digital Chart for the week ending July 18, 2020. The song also placed at number 7 on the componing Download Chart and number 74 the week of the release of the song on the componing Streaming Chart.
April - Now or Never
S.I.S - Don't Wait
If you read my blog post in the past, S.I.S. looks very similar to GFriend, from members look, their style and dance all very similar. They even chose to comeback around same time with GFriend as well.
Also they used to have 6 members before as well. But On 13th July, Double X Entertainment revealed "S.I.S will be promoting as a 4-member group with Minji, Gaeul, Anne and Sebin from now on.". Double X added on, "our contract with member Jihye recently came to an end"Dal, on the other hand, will be taking a hiatus from her promotions due to personal reason.
Pink Fantasy - Shadow Play
This group is actually not new, but I will briefly introduce them again since they are not popular. PinkFantasy is a 7 member girl group under Mydoll Entertainment who debuted with the song Iriwa on October 24, 2018, consisting of SeeA, Yechan, SangA, Yubin, and Harin, and Arang as well as a hidden member Daewang. (I have no clue about the hidden member thing, maybe they just try to be different from all the other groups)
hidden member Daewang
They didn't really get any popularity, but also came back last month to join the competition as well.