After reading the android monkey sources, i came up with this: a way to make a monkey runner "script" by hand

convert-taps.js

// Let's suppose you have this in adb:
const adbCommands = `input tap 450 450
input tap 740 280
input tap 683 614
input tap 950 411
input tap 1188 248
input tap 915 713
input tap 1176 560
input tap 1428 358
input tap 1149 789
input tap 1444 695
input tap 1707 556`

// The do a tap at XY
// you can convert them to a monkey script using this:

const splitAdbCommands = adbCommands.split('\n')
const monkeyInputs = splitAdbCommands
  .map(it => it.replace('input tap', '').trim().split(' '))
  .map(([x, y]) => [
      // what is changed here is the action (0 and 1) and the x and y coordinates
	    `DispatchPointer(6934862,6934862,0,${x}.0,${y}.0,0.0,0.0,0,1.0,1.0,0,0)`,
	    `DispatchPointer(6934862,6934862,1,${x}.0,${y}.0,0.0,0.0,0,1.0,1.0,0,0)`
    ].join('\n')
  ).join('\n')

// Give a look at the original source to understand better:
// https://android.googlesource.com/platform/development.git/+/master/cmds/monkey/src/com/android/commands/monkey/MonkeySourceScript.java#307

// The final monkey script should have a header also:
const script = `
type= raw events
count= ${splitAdbCommands.length * 2}
speed= 1.0
start data >>
${monkeyInputs}
`

// with the script output on a monkey.script file, you can run
// adb push monkey.script sdcard
// adb shell monkey -f sdcard/monkey.script


// Btw i recommend using the following:
/*
adb shell monkey \
  -p <package-name> \
  -c android.intent.category.DEFAULT \ #or any that applies here
  -f sdcard/monkey.script \
  --throttle 45 \
  COUNT
*/

monkey.script

type= raw events
count= 11
speed= 1.0
start data >>
DispatchPointer(6934862,6934862,0,450.0,450.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,450.0,450.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,740.0,280.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,740.0,280.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,683.0,614.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,683.0,614.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,950.0,411.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,950.0,411.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1188.0,248.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1188.0,248.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,915.0,713.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,915.0,713.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1176.0,560.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1176.0,560.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1428.0,358.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1428.0,358.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1149.0,789.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1149.0,789.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1444.0,695.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1444.0,695.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,0,1707.0,556.0,0.0,0.0,0,1.0,1.0,0,0)
DispatchPointer(6934862,6934862,1,1707.0,556.0,0.0,0.0,0,1.0,1.0,0,0