BYOIP Public pool and RAM sharing with Multiple accounts in same OU

Below is my usecase

1. BYOIP a public pool say 1.1.1.0/24 in a central account - aka mgmt account
2. Now I have 16 different sub accounts (same OU) , each with different VPCs (same region) and IGWs
3. I could use AWS IPAM in the management account and create the regional pool with the above /24 BYOIP range
4. Using IPAM, I would like each of the 16 sub account to use a /28 block from the IPAM from the regional pool and use the specific IGWs for ingress/egress in the sub accounts
5. I can advertize the /24 from the management account. from the documentation it seems possible, however i was just wondering if I am following up correctly and if there are any challenges. has anyone tried something similar.