Honestly, you are wrong. Google does it fairly quickly and apart from that they all take credit cards. 1M ad turnover per year is 30k cashback for a lack of cashflow of about 20k. It really does not make sense to talk about the cashflow︀ issue. Having at least 3M of sales, the delayed payout from Amazon etc. are tenfold.︁
And if you really need to solve the chashflow issue, you can still opt to︂ open a HK company, charge all ads through them and then invoice your own company.︃ Just beware that you need to register your HK company for VAT and charge VAT︄ to your own company. But you can claim it back with less delay.
Let me explain. There are only a︈ few EUR countries with 20% VAT, none of them being Ireland.
Now, you know what?︉ Google, Meta, Amazon... You know what? They do not charge VAT! There is no cash︊ flow issue. Have you ever checked your invoices? All without VAT and a note to︋ reverse charge. It is you tax office that you pay the VAT to and they︌ give it back to you at the same time!