Starting to feel hungry again two years after gastric sleeve surgery. Do not want to gain weight back. Any tips?

Have a f/u. You need to see your surgeon for a follow-up. Also, see a nutritionist to reassess your dietary needs. You should be exercising regularly.
Sweets, sip, sliders. If getting hungry after sleeve, try shifting eating behavior: avoid sweets (they trigger carb hunger); avoid sipping with food (makes food empty sooner); avoid high calorie snacks. Focus on veggies and protein.