JavaScript 비동기 흐름은 함수 안에서

let manifestDetailInfoList = [];
        
        await (async () => {
            const ret = assetIdAndSha256Names.map((assetIdAndSha256Name) => {
                const assetIds = assetIdAndSha256Name.assetIds;
                const manifestDetail = assetIds.map(async (assetId) => await fetchManifestDetail(token, assetId));

                manifestDetail.map((e) => {
                    console.log(e.then(e => e));
                })

                manifestDetailInfoList = [...manifestDetailInfoList, ...manifestDetail];
                return null;
            });
        })();