Dear Client, I am a Merchant exporter. I had lot of experience in International fund transfers.
Normally Banks will automatically charge wire transaction fees. But there is no way the respective banks ask for Western union money transfer fees, So probably that's a scam.
Kindly call up on your bank and verify the same at your end.
Also please go through this article which will be of a great help to you.
https://www.monito.com/en/wiki/bank-charges-for-sending-money-abroad

If you have any further assistance, Please get back to me.

Thank you
Warm regards
Parthasarathy

An investor may be able to wire funds to your bank account in another country, and the bank may request that you cover transfer fees through Western Union or MoneyGram. This is not uncommon, as banks often have specific protocols for handling international wire transfers and may charge additional fees. It is important to inform the investor of these fees before they make the investment and to consult with your bank regarding their wire transfer procedures and any associated fees.

Hi. In my experience generally this depends on the financial regulations in place in the country of receipt of funds. i.e some countries do not support western union etc. This would also depend on the regulations in place regarding the amount being transferred as certain amounts might cross the threshold of AML activities. Would like to advice you further if i was given more detailed specifics. Regards