THE A RECORD wont work in Light sail !

I would expect A record to work as you described, but for some reason this exact case (www.example.com -> example.com) is implemented with CNAME in Lightsail DNS documentation. If you haven't tested this yet, give it a try.

https://lightsail.aws.amazon.com/ls/docs/en_us/articles/understanding-dns-in-amazon-lightsail

For example, in the Lightsail DNS zone, you want to direct web traffic for www.example.com to example.com. You would create an alias CNAME record for www with a "resolves to" address of example.com.

PS. You didn't say what is the actual DNS name, but I assumed it sufirestaurant.com you would want to answer also at www.sufirestaurant.com. This could be helpful in finding your problem.

Google DNS says there is something wrong with your configuration of nameservers. Here is a similar problem and solution to it. https://repost.aws/questions/QUIFrDzqQ9QnCDMNBSk-625w/problem-with-lame-delegation-in-my-dns-records

$ dig @8.8.8.8 www.sufirestaurant.com

; <<>> DiG 9.10.6 <<>> @8.8.8.8 www.sufirestaurant.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 28264
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
; OPT=15: 00 00 5b 32 30 35 2e 32 35 31 2e 31 39 35 2e 31 38 30 5d 20 4c 61 6d 65 20 64 65 6c 65 67 61 74 69 6f 6e 20 61 74 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 20 66 6f 72 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 2f 61 ("..[205.251.195.180] Lame delegation at www.sufirestaurant.com for www.sufirestaurant.com/a")
; OPT=15: 00 00 5b 32 36 30 30 3a 39 30 30 30 3a 35 33 30 30 3a 37 36 30 30 3a 3a 31 5d 20 4c 61 6d 65 20 64 65 6c 65 67 61 74 69 6f 6e 20 61 74 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 20 66 6f 72 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 2f 61 ("..[2600:9000:5300:7600::1] Lame delegation at www.sufirestaurant.com for www.sufirestaurant.com/a")
; OPT=15: 00 00 5b 32 30 35 2e 32 35 31 2e 31 39 39 2e 31 39 36 5d 20 4c 61 6d 65 20 64 65 6c 65 67 61 74 69 6f 6e 20 61 74 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 20 66 6f 72 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 2f 61 ("..[205.251.199.196] Lame delegation at www.sufirestaurant.com for www.sufirestaurant.com/a")
; OPT=15: 00 00 5b 32 30 35 2e 32 35 31 2e 31 39 37 2e 31 39 35 5d 20 4c 61 6d 65 20 64 65 6c 65 67 61 74 69 6f 6e 20 61 74 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 20 66 6f 72 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 2f 61 ("..[205.251.197.195] Lame delegation at www.sufirestaurant.com for www.sufirestaurant.com/a")
; OPT=15: 00 16 41 74 20 64 65 6c 65 67 61 74 69 6f 6e 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 20 66 6f 72 20 77 77 77 2e 73 75 66 69 72 65 73 74 61 75 72 61 6e 74 2e 63 6f 6d 2f 61 ("..At delegation www.sufirestaurant.com for www.sufirestaurant.com/a")
;; QUESTION SECTION:
;www.sufirestaurant.com.		IN	A

;; Query time: 187 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Oct 09 23:42:18 EEST 2023
;; MSG SIZE  rcvd: 505