If you are on a Non-OA retirement Visa and the Visa has not expired you will be fine as the Non-OA is multi-entry for the 12 months of it's validity. If you are on a 12 month extension of stay or a Non-O Visa then you will need to purchase a re-entry permit to maintain your current stay status.
The limit of 50,000 Baht in international transfers is ONLY for people who use WISE to transfer the money and ONLY for people using a bank OTHER THAN Bangkok Bank, Siam Commercial Bank or Kasikorn Bank. So stick to these 3.
The digital TM6 (arrival form) starting in May for all foreign passports is not the ETA, that is something different which has been delayed indefinitely