florence
is available through the apt package repository. You can verify this as follows:
$ apt-cache search florence
florence - extensible and scalable virtual keyboard for X
libflorence-1.0-1 - extensible and scalable virtual keyboard for X
libflorence-1.0-dev - extensible and scalable virtual keyboard for X
qsapecng - symbolic analyzer and solver of linear analog circuits
I don't know why it won't install on your system - apt
says it will install on mine - I bailed out at the yes/no
question as I don't need it:
$ sudo apt update # always before a new install
...
$ sudo apt install florence
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
adwaita-icon-theme at-spi2-core dconf-gsettings-backend dconf-service glib-networking glib-networking-common glib-networking-services
gsettings-desktop-schemas gtk-update-icon-cache hicolor-icon-theme libatk-bridge2.0-0 libatk1.0-0 libatk1.0-data libatspi2.0-0 libcairo-gobject2
libcolord2 libdconf1 libepoxy0 libflorence-1.0-1 libgstreamer1.0-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libjson-glib-1.0-0 libjson-glib-1.0-common
liblcms2-2 libnotify4 libproxy1v5 librest-0.7-0 libsoup-gnome2.4-1 libsoup2.4-1 libwayland-client0 libwayland-cursor0 libwayland-egl1 libxcomposite1
libxcursor1 libxinerama1 libxkbcommon0 libxrandr2 notification-daemon
Suggested packages:
colord gstreamer1.0-tools gvfs liblcms2-utils
The following NEW packages will be installed:
adwaita-icon-theme at-spi2-core dconf-gsettings-backend dconf-service florence glib-networking glib-networking-common glib-networking-services
gsettings-desktop-schemas gtk-update-icon-cache hicolor-icon-theme libatk-bridge2.0-0 libatk1.0-0 libatk1.0-data libatspi2.0-0 libcairo-gobject2
libcolord2 libdconf1 libepoxy0 libflorence-1.0-1 libgstreamer1.0-0 libgtk-3-0 libgtk-3-bin libgtk-3-common libjson-glib-1.0-0 libjson-glib-1.0-common
liblcms2-2 libnotify4 libproxy1v5 librest-0.7-0 libsoup-gnome2.4-1 libsoup2.4-1 libwayland-client0 libwayland-cursor0 libwayland-egl1 libxcomposite1
libxcursor1 libxinerama1 libxkbcommon0 libxrandr2 notification-daemon
0 upgraded, 41 newly installed, 0 to remove and 8 not upgraded.
Need to get 22.7 MB of archives.
After this operation, 80.0 MB of additional disk space will be used.
Do you want to continue? [Y/n] n
$
I wonder if the tarball you downloaded was for arm
architecture - or something else?
Addendum:
May 5, 2022: The florence
package appears to have been pulled since I checked it yesterday. Today's apt-cache search
yields:
$ apt-cache search florence
texlive-publishers - TeX Live: Publisher styles, theses, etc.
Strange business! The florence
.deb package still appears in the repository here.