Dropdown Menu Histogram based on two columns - Plotly

Question

I want to plot this figure based on the selection of a value from the first dropdown menu (year) and second drop menu (company). What I get is that it doesn't take in consideration of the year selected and only take in consideration the company value selector or the one around ( year without company value)
I tried the solution proposed here and other solutions but no luck. Dropdown bar chart (plotly) based on values column

dataframe:

date    company_name    field   count
0   2015    CM          EM      3
1   2015    P&G         EP      1
2   2017    CM          MS      2
3   2017    P&G         EM      5
4   2017    POSCO       MS      8
5   2020    CM          EM      6
6   2020    POSCO       MS      6
7   2020    POSCO       EP      5

here the code I wrote:

df = data.groupby(["date","company_name","field"])['product'].size().to_frame(name = 'count').reset_index()

fig = go.Figure()
fig.add_trace(go.Histogram(x=df.field,
                         y=df.count,
                         #colorscale=df.date,
                         visible=True)
             )

updatemenu = []
buttons = []
buttons1 = []

for col,col1 in zip(list(df.date.unique()),list(df.company_name.unique())):
    buttons.append(dict(method='restyle',
                        label=col,
                        visible=True,
                            args=[{'y':[df[(df.date==col)]["count"]],
                                   'x':[df[(df.date==col)].field],
                               'type':'histogram'}
                             
                             ],
                        )
                  )
    buttons1.append(dict(method='restyle',
                        label=col1,
                        visible=True,
                            args=[{'y':[df[(df.company_name==col1)]["count"]],
                                   'x':[df[(df.company_name==col1)].field],
                               'type':'histogram'}
                             
                             ],
                        )
                  )

updatemenu = []
your_menu = dict()
updatemenu.append(your_menu)
updatemenu.append(dict())
updatemenu[0]['buttons'] = buttons
updatemenu[0]['direction'] = 'down'
updatemenu[0]['showactive'] = True
updatemenu[0]['x'] = 0.1
updatemenu[1]['buttons'] = buttons1
updatemenu[1]['direction'] = 'down'
updatemenu[1]['showactive'] = True
updatemenu[1]['x'] = 0.5

fig.update_layout(showlegend=False, updatemenus=updatemenu)
fig.show()

result:

I got the count for POSCO products but for all years not 2020. and if i select 2020, it shows the count product of all companies.

PS: Is there a way to color Histogram based on column like in Plotly Express color attribute within this case?

Thank you in advance!