How is flutter route nested?

for example, in a layout with bottom navigation ("home", "account"), the desired route is
{
"home": home page,
" account/info": user information page,
"account/pwd-reset": change password page
}
requires navigation to be frequently displayed. According to my habit of thinking, navigation should be located in the parent page

.

too many examples I have found are done in the way that tab controls index to get a page in pageList. I would like to ask, is it done in the way of router?

Dec.07,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e5b154-65c17.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e5b154-65c17.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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