Problem with lenovo tab M10 HD with android 10

Problem with lenovo tab M10 HD with android 10

hello
i have enrolled a tab with QR code with standard profil ( user canno't erase and install application itself)
all is ok with applications, weblink, ....
the problem is that my virtual keyboard is not present for all applications
only the google voice
and when i look in the parameters, not possible to choice keyboard in the langage settings because  there is no keyboard ?
can you help me please

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