Combine tomatoes, onion, jalapeño peppers, vinegar, water, sea salt, garlic, and cumin in a multi-functional pressure cooker (such as Instant Pot). Close and lock the lid. Select high pressure according to the manufacturer's instructions and set the timer for 15 minutes. Allow 15 minutes for the pressure to build.
Release the pressure carefully using the quick-release method according to the manufacturer's instructions, about 1 minute. Unlock and remove the lid.
Pull out the pot and let cool for 5 minutes. Stir in cilantro and lime juice.