Multiple entries are created during bank foreign currency revaluation.

Repro steps:
1. Go to Cash and Bank Management > Periodic
2. Foreign Currency Revaluation
3. Revalue a bank account in foreign currency.
4. System creates multiple entries for revaluation.

The current process does not have an option to select what financial dimensions should be posted at the time of processing bank foreign currency revaluation Which is available under AP and AR.

Ask from support:

Since in AR and AP module revaluation function feature is available
https://docs.microsoft.com/en-us/dynamics365/finance/cash-bank-management/foreign-currency-revaluation-accounts-payable-accounts-receivable#:~:text=Foreign%20currency%20revaluation%20can%20be,amounts%2C%20on%20a%20specified%20date.

Financial dimensions – The financial dimensions that are posted on the accounting entries of the foreign currency revaluation transactions:
• None – No financial dimensions are posted. If you have a required financial dimension in your account structure, the revaluation process is still run and creates accounting entries that have no financial dimensions. You will receive a warning message first, so that you can cancel the revaluation.
• Table – The financial dimensions of the customer account or vendor account are posted on the foreign currency revaluation transactions.
• Posting – The financial dimensions of the transaction that is being revalued are posted on the foreign currency revaluation transactions. By default, the financial dimensions from the original transaction's AR/AP ledger account will be used for the revaluation transaction's AR/AP main account, and the financial dimensions from the original transaction's expense/asset/revenue ledger account will be used for the revaluation transaction's unrealized gain/loss main account.