I'm not a reviewer but I've had a look at Severin's 8233223 backport and looked good to me too (4 / 4 certificates verified).
- [8u] RFR: 8233223: Add Amazon Root CA certificates Severin Gehwolf
- Re: [8u] RFR: 8233223: Add Amazon Root CA certifica... Volker Simonis
- Re: [8u] RFR: 8233223: Add Amazon Root CA certi... Severin Gehwolf
- RE: [8u] RFR: 8233223: Add Amazon Root CA c... Langer, Christoph
- Re: [8u] RFR: 8233223: Add Amazon Root ... Martin Balao
- Re: [8u] RFR: 8233223: Add Amazon Root CA c... Volker Simonis