@NadeemM - Just done a Salary Sort - it lets you move money from an account into any pots under the same account and it lets you move money from an account into any linked Monzo accounts (but not into pots under those linked accounts)
I can, for example, sort amounts from a receipt greater than £100 into our Joint account into the pots in the Joint account. I can also sort money to my Personal account and also to MrsW’s Personal account too:
So in your use case example, you can sort from a receipt of greater than £100 in your Personal account into the pots under your Personal account and you can also sort an amount to the Joint account in the same single ‘sort’