This command did not work for me.
I think different users may get different results depending on what country you are in and maybe which operating system you are using. You may also see different things depending on how your google account(s) are set up.
A few things you did wrong or could do better though.
First, you should always start your commands which use RoboB with a RoboB.Select action. This is an error to leave it out.
The rest is more down to what's the best method as opposed to being right or wrong. The first potential problem is that you are using a web search as your URL instead of going directly to the correct URL and this may be part of why your command does not work for other users. As far as I can tell you can navigate directly to
https://www.google.com/android/devicemanager and if you are logged in it's pretty easy to use after that.
The other problem is that when you use RoboB.ElementByTag with A 26 you can get very unpredictable results if the page changes or if you end up on a different page because it will just select the 26th link on the page. If the element you are trying to target does not have a unique name or ID then it is usually better to use RegEx.
Here's my command for doing it this way, assuming you are logged in:
<?xml version="1.0" encoding="utf-16"?>
<!--VoxCommando 2.2.2.2-->
<command id="365" name="Lost phone" enabled="true" alwaysOn="False" confirm="False" requiredConfidence="0" loop="False" loopDelay="0" loopMax="0" description="">
<action>
<cmdType>RoboB.Select</cmdType>
<params>
<param>FindMyPhone</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Show</cmdType>
<params />
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Navigate</cmdType>
<params>
<param>https://www.google.com/android/devicemanager</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Wait</cmdType>
<params />
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.ElementRegex</cmdType>
<params>
<param>div</param>
<param>^<div.class="ring-device"></div></param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Click</cmdType>
<params />
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Wait</cmdType>
<params />
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.ElementByName</cmdType>
<params>
<param>ok</param>
</params>
<cmdRepeat>1</cmdRepeat>
</action>
<action>
<cmdType>RoboB.Click</cmdType>
<params />
<cmdRepeat>1</cmdRepeat>
</action>
<phrase>where's my phone, find my phone, no clue where my phone is, </phrase>
</command>
It's also possible to write commands in a similar manner to log you in but this will vary depending on how many google accounts you have logged into from that machine in the past. It is also a bit insecure to keep your google password in command xml so I think it's better if you do this part manually when necessary.