Got this one for the 2nd row because of the seat overlap with middle seat. I wanted to be able to have someone sit on it without issues.

https://www.amazon.com/dp/B08XPXDCY1

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I have a Prince Lionheart for the 3rd row since it's 100x sturdier and no overlap issues. I had this one in the 2nd row for a minute until my wife complained about impact to the middle seat passengers.

https://www.amazon.com/Prince-Lionheart-Stage-Seatsaver-Black/dp/B000083GHY/

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I have 2 kids rear facing in tandem (3rd row and 2nd row) behind the driver. Once I can have them both forward facing in the 3rd row I'll have the Prince Lionheart protectors under both seats in the 3rd row.