Can I recharacterize excess contribution of ROTH IRA and gain to traditional IRA?

I intended to do a backdoor Roth IRA contribution in 2019, but made a mistake. Our AGI is over $200K. Here are the timelines:

3/1/2019 Contribute after-tax $6,000 to a Roth IRA account directly.

7/23/2020 Found the mistake. Moved $6,200 (original contribution and gain) to a traditional IRA through recharacterization.

01/2021 Received a 1099-R of $6,200, with R in box7 . 

 

My questions:

1) When the $6,200 was recharacterized to a traditional IRA, was the gain ($200) considered as excess contribution? 

2) If the answer to Q1 is yes, what shall I do now? 

3) If the answer to Q1 is no, can I move the money back to a ROTH IRA? The total amount is $6,500 now. What tax shall I pay?