Sentry doesn't show all transactions and Web Vitals

Question

We use combination of Sentry/NextJS

tracesSampleRate for Sentry = 0.75

Issues reports looks ok, and there are a lot of them. Really a lot. But Performance/Transactions looks cut off.

For example, Im looking at /register route. And this high load route is really under-reported. Here is the data for last 24h

• Home route has 9.5k
• Login 2.1k
• Register 224

Or same data from WebVitals tab

• /home - 2.9k
• /register - 157
• /login - 110 (Why so low???)

And Google Analytics (6k users for 24h):

• /home - 14k
• /login - 5.4k
• /register - 1.6k

UPD Here is how connection looks like next.client.config.js/next.server.config.js

Sentry.init({
  denyUrls: [
    /webkit-masked-url/i,
    /extensions\//i,
    /^chrome:\/\//i,
    /safari-web-extension/i,
  ],

  ignoreErrors: [
    'globalThis is not defined', // error occurs in the not supported browsers
  ],

  enabled: process.env.NODE_ENV !== 'development',

  // We recommend adjusting this value in production, or using tracesSampler
  // for finer control
  tracesSampleRate: 0.75,
})

next.config.js

module.exports = withSentryConfig(moduleExports, {
  include: ['.', '.next'],
  ignore: ['node_modules', 'next.config.js'],
  silent: true, // Suppresses all logs
})

UPD2 tracesSampleRate: 0.75 Because we have a tooooons of errors.

UPD3 So proportion in events rate between Sentry and GA looks pretty same. But amount not. Why this throttle could be?